Brideshead Revisited - Evelyn Waugh (or the equally good 12-episode UK TV miniseries)
Letting Go - Phillip Roth
Portnoy's Complaint - Phillip Roth
Anything by Robert Silverberg (except the Majipoor stories, they suck big time)
Tinker, Tailor, Soldier, Spy - John Le Carre
Smiley's People - John Le Carre
The Naked Ape* - Desmond Morris
The Sea Around Us* - Rachel Carson
I, Claudius - Robert Graves
Claudius the God - Robert Graves
The 'Flashman' series by George MacDonald Fraser (comic historical adventures)
The 'Hornblower' series by C S Forester (historically accurate naval drama)
Stand on Zanzibar - John Brunner
The Prime of Miss Jean Brodie - (the movie is, IMHO, far superior to Muriel Spark's original book)
The Stars my Destination - Alfred Bester
The Demolished Man - Alfred Bester