"Gardens of the Moon" by Steven Erikson
"Gardens of the Moon" is the first book in the Malazan Book of the Fallen series by Steven Erikson. Has necromancers and maybe mages, humans, horses, and empires.
I'm listening by audio. I tried to read. It's to confusing. I'm clueless what the f*ck this book is about. The more you listen to it the less you understand. I think there is an empire and rebels trying to overthrow it. Sorta. It's a lot of talking and not a lot of making any sense. With occasional horses and dead people inbetween. Too many characters and not a single one of them has anything outstanding about them to make you rivet to his/her cause. Makes you feel like a detached ghost floating past the living. You're not involved. You don't care what happens to them.