SF isn't a genre; SF is the matrix in which genres are embedded, and because the SF field is never going in any one direction at any one time, there is hardly a way to cut it off.

Another round of books just read.Some are from the same thrift store find but there are a few others in here too now.

John Boyd - The Rakehells Of Heaven (1969)
 

Robert Conquest - A World of Difference (1955)

Larry Niven - The Long ARM of Gil Hamilton (1976)

Frederik Pohl  - In The Problem Pit (1976)

How inappropriate to call this planet Earth when it is quite clearly Ocean ~ Arthur C Clarke

Round three of the sweetest gift the sweetest girl bought me.

A.E. Van Vogt ~ The Universe Maker (1953)

Edmond Hamilton ~ City at World's End (1951)

A. Bertram Chandler ~ The Way Back (1976)

There are always possibilities

Round two of the great Science-Fiction thrift store find.

Fred Hoyle ~ Element 79 (1967)

Philip K. Dick ~ The Three Stigmata of Palmer Eldritch (1965)

Edson McCann* ~ Preferred Risk (1955)
*Frederik Pohl & Lester del Rey

J. Hunter Holly ~ The Dark Planet (1971)