I recently got the first piece of finished artwork in for Classes and Equipment -- the fantastic cover image by Andrew Walter! After a bit of fiddling around in InDesign, I can now share a preview of what the book cover will look like:
B/X Essentials: Classes and Equipment cover, image (c) Andrew Walter
As a comparison, here's the cover for the first book, Core Rules:
B/X Essentials: Core Rules cover, image (c) Andrew Walter
For the first cover, I gave Andrew the brief of "adventurers facing off against a dragon". For the second book, we discussed something involving sea travel and castles, so the idea of a castle on the back of a giant turtle emerged. We actually already have a concept and sketch for the third book (Cleric and Magic-User Spells), on the theme of "scrying", but it's too early to show that yet.