Leviathan Wakes by James S. A. Corey, first in the Expanse series, is $1.99 at B&N
. Nowhere else seems to have matched it yet.
Humanity has colonized the solar system - Mars, the Moon, the Asteroid Belt and beyond - but the stars are still out of our reach.
Jim Holden is XO of an ice miner making runs from the rings of Saturn to the mining stations of the Belt. When he and his crew stumble upon a derelict ship, The Scopuli, they find themselves in possession of a secret they never wanted. A secret that someone is willing to kill for - and kill on a scale unfathomable to Jim and his crew. War is brewing in the system unless he can find out who left the ship and why.
Detective Miller is looking for a girl. One girl in a system of billions, but her parents have money and money talks. When the trail leads him to The Scopuli and rebel sympathizer Holden, he realizes that this girl may be the key to everything.
Edit: $1.99 price matched at Kobo
. (US/Canada only it seems)