Quite the issue this.
This is the problem with ebooks. Publishers, editors, and authors treat them as Cinderella stepchildren — as a way to do the work of increasing revenues without being given an opportunity to shine on their own — you know, scrub my floors, make them shine, but don’t walk on them. The consequence is that what should be an excellent reading experience becomes an annoying one. The neglect becomes evident, and the $14.99 the publisher demands for the ebook version becomes a sore point. In my case, it becomes a double sore point because I bought both the hardcover version (where the illustrations are readable) and the ebook version as I noted in The Lure of eBooks: Gotcha!. I might have done this again with another TOR/Macmillan book, albeit reluctantly, but now you can bet I won’t. Rip me off once, shame on you; rip me off twice, shame on me!