Try the First Blade trilogy by Joe Abercrombie, although it is not available as an ebook (at least legally).
I also enjoyed the books by Alastair Reynolds and Vernor Vinge so maybe this will be to your liking. It is a very unusual fantasy in many ways, one of the "heroes" is an inquisitor. The other characters first look like the usual stereotypes, but.....
Also the book is quite realistic, grim and violent, with quite a few unexpected surprises.
I really cannot tell more without spoiling the fun.
Some other recommendations:
Blindsight by Peter Watts is brilliant and dark SF. And it is free.
Black on Black by K. D. Wentworth is SF featuring a race with a unique culture. Also free from the Baen free library.
The Book of the New Sun tetralogy by Gene Wolfe is very engaging and unusual SF, although sometimes a bit slow-paced.
The Bohr Maker by Linda Nagata is also very good SF focusing on nanotechnology.
The Day of the Triffids is a very interesting apocalyptic SF story by John Wyndham.