The art in this volume is SPECTACULAR. Specifically, in Challengers Of The Unknown #4, #5, #6, #7 and #8. The legendary Jack Kirby is inked by the EQUALLY legendary Wally Wood (Daredevil, EC Comics, MAD, The Outer Space Spirit and the T.H.U.N.D.E.R. Agents to name a few).
This volume represents the work of two comics masters at the height of their ability showing how it's done! Wally Wood was an acknowledged master of futuristic sf ships and monsters and his control of light an line always brought a certain polish to any book on which he worked. Kirby is, well... Kirby. Kirby helped define the visual language of sequential illustration and his creations and concepts have been the foundation of Marvel Comics since the Silver Age.
To have Kirby partnered with Wood is about as good as it gets!
For the record-
This volume covers 1957- 1961 and reprints Showcase #6 , #7, #11, #12 and Challengers Of The Unknown #1-17
It's Kirby. It's Wood. It's a GREAT read. AND... it's cheap. 'Nuff said.