I love to read. It is probably my only real "hobby" other than shooting. That being said, I'm also extremely picky and very critical about realism when it comes to firearms, tactics, and police procedures in books. None of them are perfect, but as soon as I think it gets too bad...the book goes in the garbage. The Spenser novels are one of the few exceptions. Normally, a "flipped the safety off on his Glock" line will end a book for me. Spenser is such a cool character that he gets a pass.
The "Prey" series, by John Sandford. Excellent police series with an author that knows guns. Make a few little boo-boos here and there, but mostly well done. The hero (independently wealthy Minneapolis Police Detective who drives a Porsche 911) starts the series with a H&K P7, but switches to a Sig P220. He often references his gun collection that includes such goodies as twin Colt Gold Cups and a Python.
The "Atticus Kodiak" series, by Greg Rucka. Series about a bodyguard/executive protection agent in New York City. He carries an H&K P7, but keeps a S&W 6906 and a S&W J-frame around also.
The "Repairman Jack" series, by F. Paul Wilson. I'm not a science fiction or "spooky" book fan, but this series is GREAT. It is like "The Equalizer" meets "The X-Files". Takes place in New York City and his best pal sells guns out of the back of his sporting goods store. Jack is an "anti-hero" here. Great series.
The Detective Brian McKenna series, by Dan Mahoney. Dan is a retired NYPD Detective whom I have had the pleasure of meeting. He writes fictional novels that include many real persons and places that are part of the "cop scene" in Manhattan.
"Buzz Monkey" by Sam Hill.
Anyway, just a few of my favorites. Hope they open a few new doors for some bored readers.