Incredible Hulk Annual #5 features the second appearance of Groot (of Guardians of the Galaxy fame).  It is Groot's first appearance since 1960, when Groot first appeared in Tales to Astonish #13.   

This is an underappreciated but surging Bronze Age key book written by none other than Chris Claremont of X-Men fame.  It sports a Jack Kirby cover to boot.  Heck, this book is almost 50 years old now!  The book is square-bound and notoriously suffers from twisted, crushed, and out-of-alignment spines.  This book has perfect alignment and a nice, square spine, and it sports bright colors and gloss.  It is graded 9,4 NM with white pages by CGC.