Book Designer -
https://wiki.mobileread.com/wiki/Book_Designer
It's "quirky" (to downright annoying) but there's a couple of Tutorials for it -
https://www.mobileread.com/forums/showthread.php?t=10313 and
https://wiki.mobileread.com/wiki/Book...raphical_Guide
ADE - That's my understanding, but I've not really checked, but unless someone does pop up to correct, it's probably correct! :-)
My 505 - I bought it mail-order from B&H in New York around 14 months ago, although I've recently reflashed it to use the UK firmware (then reflashed that to add a few tweaks such as displaying the time and unified title fonts - See
https://www.mobileread.com/forums/showthread.php?t=27177 for more info about that)
I get a lot of books from Baen Books/Websubscriptions (SF&F), with some from Fictionwise or Books on Board, with a few from the Essex Online library -
http://essex.bookaisle.com/ - which appear to be available to non-Essex residents too).