Richard Ellmann - "Oscar Wilde"
My favourite book. The biography that won Ellman the Pulitzer. Incredibly detailed and informative, and so many things at the same time, from love story to art criticism.
As for Wilde himself, all of his works are in Public Domain, and available for free as Kindle ebooks, for example. "De Profundis" and "The Importance of Being Earnest" are his best works.
The Holy Trinity of poets - Gottfried Benn, T. S. Eliot and Charles Baudelaire.
Most of Eliot's work seems to be available for free on the Internet. Here's my favourite poem:
http://www.msgr.ca/msgr-7/ash_wednesday_t_s_eliot.htm As for Baudelaire, "Les Fleurs du mal", his best work, is, again, available for free. There's a Kindle version, too. No reason not to get this stuff.
Stanislaw Lem - "Solaris" and "The Futurological Congress", for example. Science fiction.
Lord Dunsany - Short stories. Fantasy.
Some collection of Greek mythology.
"The Little Black Book - Movies". Silly title, but a fantastic read for movie lovers. It's a collection of short articles, detailing the history of the cinema.