Adapting an Existing Open Textbook

Pressbooks makes it easy to adapt and redistribute an existing open textbook.

When adapting an open textbook, keep it simple, especially if you are approaching a remix project for the first time. While it may be tempting to make a number of major changes to a textbook before releasing it to your students, think of the textbook as a living resource that you can improve incrementally over time.

Getting Started

Step 1: Find an Open Textbook to Adapt

The best sources for finding open textbooks include:

Other ways to find open textbooks:

  1. Connect with your subject librarian
  2. Ask your colleagues if they use open textbooks
  3. Ask your students to find open resources as part of a class activity. Have them do a content review and post the results to your course website or learning management system (e.g., Blackboard).

Step 2: Check the license and file format

Once you have found an existing open textbook you would like to adapt, check the license to make sure you have permission to modify the content. As long as the Creative Commons license does not have a No Derivative (ND) attribute, you will be able to change the contents of the book.

If you want to adapt an open textbook using Pressbooks, you will also need it in a workable technical format, i.e. an editable file type. This includes:

  • Pressbooks or WordPress files (.xml or .wxr)
  • HTML files (.html)
  • Word document (.docx) or OpenDocument Text (.odt)
  • Simple text files (.txt)
  • EPUB 
  • LaTeX files (if the original book includes math or science formulas and equations)

Pressbooks makes it especially easy to copy, or “clone”, an existing book hosted on any Pressbooks platform.

Avoid PDF documents

Many open textbooks are only available as  PDF documents, which are not editable. If you want to adapt an open textbook that is only available in PDF format, you will need to convert the PDF document to one of the editable formats listed above.

Converting a PDF document to an editable format is a difficult, time consuming, and imprecise process. Before taking the time to do this, consider contacting the author and asking for a copy of the textbook’s source files.

Step 3: Contact Us

Once you have an editable file, contact us at We can discuss whether Pressbooks is the most suitable platform for your work, and review our Memorandum of Understanding with you for using MacEwan’s Pressbooks service.

For more information about using Pressbooks, see the What is Pressbooks section of this book.

IMPORTANT NOTE: The MacEwan University Pressbooks service through MacEwan Open Books is currently a pilot ending January 2021 and is mainly supporting the creation of select works by MacEwan University faculty members. This pilot will inform future use of this platform, and the possible creation of additional titles. Learn more.

Planning Your Adapted Open Textbook

Before adapting an existing book, it’s important to consider the layout and style of the work, and the changes that you would like to make. Whether your adaptation is small or large, this step is important to ensure a cohesive and consistent final product.

Here are some tips to help you with style, consistency, and making changes.


To begin, you may want to explore the Style Guide section of this authoring guide. Consider creating a Style Sheet that identifies the idiosyncrasies of your adaptation in terms of style, such as citation, spellings, and layout. If you are creating a Canadian edition of a textbook, remember to adjust the text to use Canadian spellings.


One of the challenges to adapting an open textbook is to create a final product that is consistent throughout. It is highly recommended you assess the original textbook before you begin. Once this has been done, attempt to match all revised and new text, resources, layout, and citations to that of the original work.

Assess language and tone

Begin by assessing the style and tone of the original text. Here are some elements to keep in mind:

  • Is the tone of the language formal, or friendly and conversational?
  • How does the author address the reader? Does the author address the reader from a distance, or include the reader with phrases such as “we will learn” and “you will see”?
  • How is punctuation used? For example, are serial commas used, i.e. a comma before “and” when listing three or more things: “the cat, the dog, and the horse” OR “the cat, the dog and the horse”.
  • How long is the typical sentence? How long is the average paragraph?
  • Pay attention to the word count for existing chapters (average and range). Try to maintain this count for both new and revised chapters.

What is the layout?

As you review the textbook, take note of the following:

  • Does each chapter contain specific pedagogical features such as Learning Objectives, Exercises, Summary, Suggested Readings, or highlighted points of interest?
  • Does the author use lists? If so, have they used bullets, numbers, or something else?
  • How are headings used? Are sub-headings used? What is the highest and lowest heading level used?
  • How long are sections under a heading or sub-heading?

How are resources used?

Resources refer to all items other than text, such as photos, graphs, diagrams and multimedia content (video or audio links). Pay attention to what types of resources the original author used, how often they are inserted, and how they are labeled.

  • Resources should have some form of description, like a caption or transcript (e.g., Figure 1 + description). See Alternative Text Description for Images and Audio Descriptions and Transcripts for instructions on how to create the proper descriptive information for your resources.
  • Differentiate between figures and tables (e.g., Figure 1.2 or Table 1.2).
  • For adaptations, use the numbering system employed by the original author.
  • For new creations, use a numbering system that incorporates the chapter number and image sequence. For example, the first figure in Chapter 1 would be labeled Figure 1.1.
  • New resources can be added to the adaptation, however, keep the overall textbook in mind. When adding a new resource, ensure that it enhances the flow of the book.
  • Attributions should be based on the Creative Commons Best Practices for Attribution Guidelines.

References and citation style

When reviewing the textbook, identify both the citation style, and how and where references are listed in the book (e.g., at the end of each chapter, at the end of the book, or as footnotes). Note how in-text citations are used, including punctuation. Consider using the same citation style.

What Will You Change?

Adapting or changing an existing open textbook doesn’t need to be onerous. The changes you make can be as simple as:

  • Changing the title of the book, or the titles of its chapters or chapter sections.
  • Adding one or two new images.
  • Removing a chapter that isn’t pertinent to your course.
  • Extracting a chapter to be used in your course and leaving the rest of the book behind.

Sometimes, an adaptation might require more than a few simple changes. For example:

  • A significant number of chapters might be removed, leaving behind just the ones that fit the curriculum.
  • Chapters might be reordered to more accurately match the sequence in which material is presented in a course.
  • The entire work might be adapted as a new Canadian edition with new content and examples added throughout.

It might be necessary to add material from other open textbooks or open educational resources to the open textbook you are adapting.

Maybe you will decide to write new material to fill in the gaps of an existing textbook such as adding new examples or exercises.

Will It Be Difficult?

How easy or difficult this will be depends on a number of factors, including;

  • How much content you wish to change. Do you want to remove chapters, or rewrite entire chapters of content?
  • The format of the original textbook. A Word document is much easier to modify than a PDF document.
  • The type of license the content is released under. Does it have a Creative Commons license that allows for modification or adaptation of the content?
  • How comfortable you are with using technology and creating content?

Keep a Record of All Changes and Additions

As the author, you retain copyright of all new material you create. This means that even if the new material you create is released under an open license, as the author, you will receive attribution for your contribution.

As you edit and make changes (text and images) and/or add new material, such as a chapter or section within a chapter, keep a list so these additions/changes:

  • Can be included as part of the Copyright Notice on each page or at the end of the book.
  • Can be accurately attributed to you, the author.

Minor changes, such as fixing grammatical or spelling mistakes, don’t need to be documented.

If you add material from another openly licensed work to your adaptation record the source and where it is used in your adapted version. This information is needed for the wording and placement of each attribution statement required for each Creative Commons licensed work you use. For more information, see Attribution Statements.

Changing Images: Add New Ones or Remove Old Ones

With an openly licensed resource, you are welcome to remove images that don’t fit your needs or you can add new ones. You are also permitted to edit existing images, as long as their license allows modification.

For more information see:

Consider Using a Subject Matter Expert and Copy Editor

Even the best author benefits from the keen eyes of a copy editor to provide feedback on grammar, spelling, readability, clarity, and consistency (see Working with Copy Editors).

A subject matter expert — presumably a colleague or other individual who is an expert on the topic you’re writing about — can provide suggestions about the content. It is best that the peer review of your work occur before the copy editor.

One final step is to have a copy editor proofread the final draft.

Content adapted from “Three Steps Before you Begin” in the Ryerson Open Textbook Authoring Guide by Ryerson University, which was adapted from the BC Open Textbook Adaptation Guide by Lauri M. Aesoph, each licensed under CC-BY 4.0.


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MacEwan Open Textbook Authoring Guide by MacEwan University Library is licensed under a Creative Commons Attribution 4.0 International License, except where otherwise noted.

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