One of the read-worthy books which immediately came to mind is Neverness [1] by David Zindell. It is actually the 'prequel' to a series ('A requiem for Homo Sapiens' [2]) which I have yet to read, but it stands by itself as far as I'm concerned.
If you like SF, mathematics and deep ideas, this might be a book for you.
If you like SF, mathematics and deep ideas, this might be a book for you.
[1] http://www.goodreads.com/book/show/968997.Neverness
[2] http://www.goodreads.com/author/show/399921.David_Zindell