In 1983 Marvel published a series of D&D storybooks and coloring books under license from TSR. (One year later, the roles would be reversed for the Marvel Super Heroes RPG, published by TSR under license from Marvel.) I believe these are the only two storybooks. You can read The Forest of Enchantment here. The Treasure of Time is here. Both PDFs are originally from Kuronons’ D&D Goodies Collection.
They’re kid’s books, so it’s pretty juvenile stuff, and there’s no effort to introduce the concept of role-playing (unlike the 1979 AD&D Coloring Album). All but two of the characters from LJN’s first run of AD&D action figures make appearances, so the books are basically long toy commercials.
Nevertheless, they’re notable for a few reasons: Bob Stine is Goosebumps author R.L. Stine, and Jane Stine, who founded Parachute Publishing, is his wife.
As for the art, Earl Norem did the interior work for The Forest of Enchantment, and Marie Severin did the cover and designed the book. She also illustrated The Treasure of Time. Severin was a colorist at EC until the notorious publisher was run out of town by the Comics Code. She worked for Marvel—as colorist, inker, and penciler—from 1959 until the early ’90s. She is one of the most well-respected artists in the comics field.
Famously, Severin was directed to soften the facial expression of the Hulk on one of the most innovative covers in Marvel’s history: The Hulk King Size Special #1 (1968). See both versions here. The artist who made the Green Guy too savage for public consumption? Jim Steranko.
2 Warps to Neptune 