Published May 2, 2026, 8:45 AM EDT Andy is a senior writer and former Mac editor at HTG. He has over 20 years experience as a consumer tech journalist, and has covered everything from the old Palm Pilots to the original iPhone and Android devices, to the latest gadgets. He has written and edited for UK-based print publications like PDA Essentials and Android Magazine , and online at sites including  MUO , Android Tips and Hacks , broadband.co.uk , and Envato . He has a passion for all things mobile and has been a keen Mac enthusiast since 2005. If you sideload books onto your Kindle, you'll know that things don't always go smoothly. Files sometimes don't even convert properly, the formatting can be completely unpredictable, and your library becomes messy very quickly. That's why I convert my eBooks in Calibre before putting them on my Kindle. It fixes almost all the problems.…