Andrew Grant is Lee Child's brother. I saw them together at an author signing/discussion at Murder by the Book in Houston. I thought that you could tell this was Grant's fist book. I still liked the book but I look forward to his next as I think it will be much better.

Here is the official version:

From Publishers Weekly
Starred Review. Jason Bourne fans will welcome Grant's thrill-packed debut, which introduces Lt. Cdr. David Trevellyan, of Royal Navy Intelligence. Near the end of a mission in New York City, Trevellyan's chance discovery late one night of a bum in an alley with six neatly arranged bullet holes in his chest makes the secret operative the NYPD's prime suspect in the man's murder. After the FBI takes over the case, Trevellyan learns the victim was an undercover agent for the bureau, the sixth to die in a series of killings. Disavowed by his British bosses, Trevellyan realizes he has to fend for himself in what is clearly some sort of frameup. A villainess with a taste for genital mutilation lends a James Bondian touch, but Grant, bestseller Lee Child's younger brother, never strikes a false note in a plot that could have gone over-the-top in lesser hands. Effortlessly filling in bits of his protagonist's backstory during breathing spaces between action scenes, Grant closes on a nicely dark note.

I was surprisingly pleased by the book and at times had a hard time putting it down. Andrew Grant does a good job describing surroundings but does not get weighed down in too much detail so the reader feels lost. I hope to read another book by this young author in the future to see him grow as a writer.