There are 3 books in the The Grimnoir Chronicles series. The newest book is Warbound which came out in 2013.

1
Hard Magic

Book cover of Hard Magic
Jake Sullivan is a war hero, a private eye - and an ex-con. He's free because he has a magical talent - being able to alter the force of gravity in himself and objects in his vicinity - and the Bureau of Investigation call
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2
Spellbound

Book cover of Spellbound
Dark fantasy goes hardboiled in Volume 2 of the hard-hitting Grimnoir Chronicles by the New York Times bestselling creator of Monster Hunter International. The Grimnoir Society's mission is to protect people with magic, and they've done so - successfully and in secret - since the mysterious arrival of the Power…

3
Warbound

Book cover of Warbound
Book Three in the Grimnoir chronicles, and sequel to Hard Magic and Spellbound. Only a handful of people in the world know that mankind's magic comes from a living creature, and it is a refugee from another universe. The Power showed up here in the 1850s because it was running…