This is a copy of Fantastic Four #79 printed by Marvel Comics in 1968.
 
Cover pencils by Jack Kirby, inks by Joe Sinnott. A Monster Forever?, script by Stan Lee and Jack Kirby (co-plot), pencils by Jack Kirby, inks by Joe Sinnott; Ben and Alicia are attacked by a Mad Thinker android; Reed learns of Sue's medical problems but does not tell her. Crystal (of the Inhumans) appearance. in Marvel's Greatest Comics # 61. 32 pgs.