"Illustrated ebooks" refers to electronic books that include visual representations, such as drawings or pictures, to enhance the reading experience. Full definition
The company has set out a largely reasonable page - count system for determining the length of an ebook, although authors with illustrated ebooks don't seem to benefit. (rogerpacker.com)
We have not seen a market develop — at the customer or vendor level — for illustrated titles or enhanced illustrated ebooks. (publishingperspectives.com)
On top of the complexity of placing an final product (novel or illustrated ebook of boils or what have you) in the hands of readers, indies must be salespeople. (davidmarkbrownwrites.com)