When it comes to book production, InDesign is your best tool for graphic production. Even Photoshop are commonly put in a special graphic container produced in InDesign, exported as a PDF, and then placed into the book.

InDesign is the best graphics tool for book production
This book, which is an updated excerpt from David's "Writing In InDesign", shows book designers how to use InDesign effectively and efficiently for the graphic production needed for their book designs.

It covers formats needed and ebook requirements, the use of object styles, basic drawing techniques, and so on. The book is in full-color, because most books sold are now ebooks in full color.

David has been self-publishing books since the mid-1990s and was a very early adopter of Lulu, then Createspace, then Kindle KDP, Scribd, Nook, Kobo, and Smashwords. Few writers have the breadth of experience is the new paradigm of self-published indie authors.

This book will help you.