I got my "The Books of Earthsea: The Complete Illustrated Edition" by Content & Devices, Download to PC for USB transfer. I picked PW3 as destination. I did since get an Oasis gen 2, but gave it away.
It's got 73 images!
00007.jpg is the Earthsea map 1172 x 916, 118 k Bytes.
00009.jpg might be largest file size of 121k, colour illustration 676 x 1045
It's just before the Contents Page of the 1st book, A Wizard of Earthsea and its CSS is height: 100% and width: auto.
Lovely on my Libra and Sage
Not tried it on colour tablet or any of my Kindles.