Kate Elliott has an omnibus of The Novels of the Jaran which include
Jaran, An Earthly Crown, His Conquering Sword, and The Law of Becoming
ISBN:9781480465220
http://store.kobobooks.com/en-us/boo...-of-the-Jaran/
Science Fiction/Fantasy
There are several omnibi from Mercedes Lackey from her Five hundred kingdom series (Fantasy/Romance)
A Tale of the Five Hundred Kingdoms Volume 1
(The Fairy Godmother\One Good Knight)
ISBN:9781460336137
http://store.kobobooks.com/en-us/boo...doms-Volume-1/
A Tale of the Five Hundred Kingdoms Volume 2
(Fortune's Fool\The Snow Queen)
ISBN:9781460338278
http://store.kobobooks.com/en-US/ebo...gdoms-volume-2
A Tale of the Five Hundred Kingdoms Volume 3
(The Sleeping Beauty\Beauty and the Werewolf)
ISBN:9781460342947
http://store.kobobooks.com/en-us/boo...doms-Volume-3/
All of the above are currently eligible for kobo coupons