Most of my "re-reads" have been mentioned already but a few notable exceptions
" Puckoon" by Spike Milligan ( I strongly advise against reading this on the Underground, as you tend to be subjected to giggle and LOL fits)
Thorne Smith. especially
"Night Life of the Gods"
" The Bishops Jaegers"
" Turnabout"
The 2 Topper Books
and many more of his (all,to my great glee, available from Project Gutenberg as FREE downloads for my e book!!!)
John Harveys "Inspector Reznick" Novels
and as anyone who knows me will tell you
"The Rubiyaat" is a constant and much quoted companion
"The Prophet" Khalil Gibrhan