Used paperback of Who Knocks? edited by August Derleth.  Book is in good+ to vg- condition with reading wear and creasing present.  Spine has reader's creasing present.   Fairly heavy tanning to the interiors.  Published in the UK by Panther in 1964, 1st Panther paperback printing.  Buy with confidence - our 46th year with an open shop.  DreamHaven Books & Comics 2301 E. 38th St. Minneapolis, MN 55406.