Well, whilst in Switzerland I read:
'On Liberty' by J.S. Mill: If you are prepared to penetrate his verbosity and rather pompous style, it is thoroughly interesting and a philosophy that I feel a lot for.
'Nausea' by Jean-Paul Sartre: Entertaining wiffle, followed by amusing wiffle, followed by frankly bizarre and utterly nonsensical wiffle, with a bit of emotional wiffle, until I actually found something really worthwhile in the last two pages.
'The Demolished Man' by Alfred Bester: Great story, an effective marriage of pulp fiction and more serious literature, wonderfully psychotic, yet charming, anti-hero, and pre-crime in all but name, well before Minority Report. Not a classic by any means, but well worth reading.
'Notes from Underground' by Fyodor Dostoevsky: Classic Dostoevsky, as ever his comprehension and portrayal of the human psyche is penetrating and accurate, if a little unsettling, the almost-rambling, but nonetheless eloquent prose and dwelling on matters of the mind rather than events, it's excellent.
'The Double' by Fyodor Dostoevsky: Not-so-classic Dostoevsky. His second novel, I found it a prosaic premise, executed poorly, with bland dialogue, poor description and a central character about whom I could not make my mind up. Not a recommendation.
'The First Circle' by Alexander Solzhenitsyn: This one, however, is a bona-fide masterpiece. Solzhenitsyn manages to adapt the style of his Russian literary predecessors to a more modern, snappier, 20th century bent, one certainly suited to the story. A plethora of characters inhabit the title, some amusing caricatures, others you might liken yourself to. A simultaneously hilarious and damning inditement of the paranoia of Stalinist Russia, the book contains everything from cutting satire to serious philosophical considerations. Mavrino really is a microcosm for the entire world, with the variety of dispositions and personalities contained within.
'Utilitarianism' by J.S. MIll: Exactly what it says on the tin. I really appreciate and agree with what he's saying, but see comments for 'On Liberty.' The same applies here.