Good, Deep, Fantasy/Sci-Fi Series (for Older Readers)

[Cry Me A River]

Science Fiction

Uplift War by David Brin
http://en.wikipedia.org/wiki/Uplift_Universe

Vorkosigan Saga by Bujold
http://en.wikipedia.org/wiki/Vorkosigan_Saga

The Alliance-Union universe by C. J. Cherryh
http://en.wikipedia.org/wiki/Alliance-Union_universe

Childe Cycle by Gordon R. Dickson
http://en.wikipedia.org/wiki/Dorsai


Fantasy

Vlad Taltos novels by Steven Brust
http://en.wikipedia.org/wiki/Vlad_Taltos

The True Game series by Sheri S Tepper
http://en.wikipedia.org/wiki/The_True_Game

Books of the Swords by Fred Saberhagen
http://en.wikipedia.org/wiki/Book_of_swords


Just off the top of my head mind you...