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Beat and Beyond...

Buy used from: £13.55
Still haven't quite figured everything out yet, but I'm on the way there...When it's not being disturbing it's sidesplittingly funny - just shows you what a work of genius this is.
On the RoadOn the Road by Jack Kerouac
Buy new: £5.70 / Used from: £0.76
Yeah, yeah, yeah - it's 'that' one again, but it cannot be understated just how goddam good and important this book actually is.
Post Office: A NovelPost Office: A Novel by Charles Bukowski
Buy used from: £1.44
Working in dead end jobs and living on a diet of booze and sex. If you can't relate to this you're emotionally dead
Collected Poems, 1947-85 (Penguin Twentieth Century Classics)Collected Poems, 1947-85 (Penguin Twentieth Century Classics) by Allen Ginsberg
Buy used from: £4.99
Selected by Ginsberg himself from his own poetry, this is perhaps the most definitive collection available.
A Coney Island of the Mind (New Directions Paperback No. 74)A Coney Island of the Mind (New Directions Paperback No. 74) by L Ferlinghetti
Buy new: £4.58 / Used from: £2.98
You can almost hear the jazz.
Mountains and Rivers without EndMountains and Rivers without End by Gary Snyder
Buy used from: £11.65
Nature poetry normally bores me to death - but this is probably the most spiritual thing (and I mean in the truest sense of the word) I have ever read.
Fear and Loathing in Las VegasFear and Loathing in Las Vegas by Hunter S. Thompson
Buy used from: £1.65
Not strictly 'Beat', but conforming to the notion that a man searching for the ultimate 'hit' travels away from society...Kerouac meets Burroughs, basically.
Rumblefish (Puffin Teenage Books)Rumblefish (Puffin Teenage Books) by S.E. Hinton
Buy used from: £3.47
Again, not strictly 'Beat', but draws heavily upon the ideas of Kerouac, et al - throwing Camus in for good measure.
One Flew Over the Cuckoo's Nest (Picador thirty)One Flew Over the Cuckoo's Nest (Picador thirty) by Ken Kesey
Buy used from: £0.01
The film's only excellent because it had an excellent source of material to draw upon.
Tropic of Cancer (Harperperennial Classics)Tropic of Cancer (Harperperennial Classics) by Henry Miller
Buy used from: £0.74
He lit the torch, really - so I suppose it's only fair we put the old so and so in.