After reading the synopsis and a few reviews of this book I just had to see for myself even though it's not the kind of book I usually pick up. 
 The whole story, described as high fantasy in the era of steam, is pretty much a heist story set in a rather corrupt empire where there is not just magic (or mental sciences as it is called by some of the characters) but also steam operated machinery and it all has very late 19th century feel. There's also a touch of feminism added to the mix. :) 
 The whole story kicks off when enforcer Amaranthe is sent on a suicide mission to kill the deadliest assassin in the empire. She becomes an outlaw, forms a group of misfits (the deadliest assassin, a drunken professor, a pretty gigolo and streettrat wizard boy) and sets off to save the emporor. While she still can't believe how she ended being the leader, she is very smart and accomplished and clearly a born leader. She gets out of a few very tight spots thanks to her cleverness. 
 The whole book is hilarious and I'm looking forward to the next one.