This is another volume of rebound US comics similar to Fantastic Adventure and Daring Adventure. Whereas those two volumes carried rebound Dell comics, this issue contains coverless K.K. Publications/Western Publishing Company, Inc. (Gold Key) comics:
Magnus, Robot Fighter 11, August 1965
Boris Karloff Tales of Mystery 12, December 1965
The Twilight Zone 9, November 1964
The contents range over a 13-month period to the end of 1965, but the decimal currency suggests it was published in 1966 rather than late 1965.