"tried to download the ebooks to my kindle" what method did you use?
Using Windows Explorer, I just drag and drop from pc to Documents folder on Kindle then when done eject kindle (safely remove hardware)
The Huawei Mate Xs could’ve been the first great big-screen foldable
Doodler Jon Burgerman has a great body (of work!)
Apple Arcade ain't what it used to be
Test : le Yoga C740 de Lenovo