I would have much less of a problem with these edits if they were loudly announced from the cover, and used not the original title of a work, but an altered one, such as "Ian Fleming For Kids". Though I wouldn't want to see originals displaced or even outnumbered by "For Kids" or similar versions.

But if they use the original title and author, I expect the original work. Because that's literally what the title and author on a book cover mean - this work, as written and approved by this author, no different than the ingredients list on food. Anything else* is lying.

*Translations give the translator's name, and don't pretend they're the original. And editors probably should be credited, but at least in that case the edits are approved by the author.