This is a five-step guide for faculty, and those who support faculty, who want to modify an open textbook. Step-by-step instructions for importing and editing common open textbook file and platform types are included. Read it for yourself at:

a book cover with the title and nmes of the authors.
Modifying an Open Textbook: What you Need to Know by Cheryl Cuillier, Amy Hofer, Annie Johnson, Kathleen Labadorf, Karen Lauritsen, Peter Potter, Richard Saunders, and Anita Walz. Part of the Open Textbook Network.