No Hero by Jonathan Wood

Combining Urban Fantasy with Police Procedural should be pretty much a no-brainer for a competent author and this is what we have with No Hero by Jonathan Wood. A middle aged police detective switches careers and joins British super-secret agency that deals with horrors from another dimension.

In the end it is a fairly good read but not nearly as good as Charles Stross's Laundry series, nor Ben Aaronovitch's Rivers of London. The characters are a bit lightly sketched out and the action is predictable, though entertainingly gory.

I'd recommend reading it if you love the cross-genre and have read the top-tier stuff.