Here's some of the process from creating the cover, from sketch, to pencils to paint. You might notice some the books on the initial list that were cut from the book in the initial sketch. The finished cover is all hand-painted with gouache, about 15" x 22".
Initial workup for the cover, featuring some of the books that didn't make into the final cut.
Initial pencils for the cover illustration.
Plotted Cover Illustration
And here's the full front and back, with part I of Huck Finn on the back cover, designed by Adam Grano.
Plotted, Sample Pages
The opening a pages of "Watership Down" featuring a hand painted title design.