Cozies and Domestic Mysteries
Cozies contain generally a minimum of violence and graphic unpleasantness (blunt instruments and poisons are popular weapons), and they often take place in a house, village, small town, academic setting, or other benign, familiar and conventional social setting, with characters who are usually civilised and mannerly. The mystery is usually solved by an amateur detective who understands human nature and is gifted in observation and deduction. "Cozy" is pretty much the opposite of "hard-boiled."
The Game's Afoot (Johnson County Library, KS)
Novels featuring puzzles and games. Author, title, summary, webcat link for more than 40 novels, from David Baldacci's The Winner to D.B. Weiss's Lucky Wander Boy. Some games include gambling and casinos, the lottery, video games, dominoes, bridge, charades, go, chess, mah-jongg, cribbage, word games, Scrabble.
There are lists of Financial, Business and Math Fiction, Fiction Featuring Modes of Transportation, and of course a metalist of lists of thrillers to read if you like the DaVinci Code. And they have a blog.