[kunkel321]

Hi again Chaley. If I go to the CC settings, and set the MOBI folder, it's already at /storage/emulated/0/Books/. If I manually choose the folder called "Books" that is under "Internal Storage," then it still shows /storage/emulated/0/Books/. (BTW I LOVE the little animated icon!!!!) Is this the folder that you are using on your device? It appears that all of the books (MOBI, PDF, etc) that I've synced with CC are in there. This includes the couple-of-hundred that are working normally, and also includes the more recently synced ones that don't show up in the Fire's book browser. Oddly, I have a couple the are from Amazon.com, and the DO NOT appear to be in that folder (?!) What other folder could they be in? I looked around and couldn't find them. I also have a micro SD card, and can't find them there.

Question: What type of tablet are you working with? Mine is a Fire HD 10 (7t Generation). The OS is Fire OS 5.6.1.0. I can't help but be suspicious that Amazon has pushed an updated that is blocking non-Amazon books.

EDIT: I logged the result of converting an EPUB into a MOBI file, in case it offers any useful information... Sent link to zipped folder in private message.