Discworld: Going Postal, Making Money, and Raising Steam (3 books total)

The Lies of Locke Lamora (and sequels, 3 books total so far)

The Name of the Wind (and sequels, 3 books total so far)

Ancillary Justice (and sequel, 2 books total so far)

All of Iain M. Banks Culture series

Old Man's War (and sequels)