The early D&D Endless Quest books were filled with line art from the great old school TSR artists. Most of these pieces will be unfamiliar to you, since TSR didn’t recycle the art endlessly (as was their modus operandi.)

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Unlike the interior art, the cover art by Larry Elmore was recycled.
Revolt of the Dwarves (Endless Quest Book 5: Dungeons & Dragons)
1983 … Rose Estes (author) & Larry Elmore (cover) & Jim Holloway (interior art)

Endless Quest books in the shop

Revolt of the Dwarves at Amazon

No effort was spared in this book. I counted Twenty-six (26!) pieces of full-page art by Jim Holloway, plus a two-page spread and several smaller sketches. Following are some samples:

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An encounter with a lizardman

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You are shrunk!

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This two-page spread could have been improved with larger margins at the binding
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A wood golem… and the results of one of your choices

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A meeting with a dryad… and a poor choice

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Endless Quest books in the shop

Revolt of the Dwarves at Amazon

See also: Raid on Nightmare Castle: The Jim Holloway interior art in the 14th Endless Quest book (1983)

The first four Endless Quest books (1980-82): Old School Gems

Endless Quest books

D&D puzzles

Renegades of Luntar (Endless Quest Books: Crimson Crystal Adventure 3)

Days of the Dragon: 1982 Dungeons & Dragons Fantasy Art Calendar