AllReaders – Search engine for novels, with specific search elements, including plot, theme, characters, and setting.
Bibliomysteries – Information about bibliomysteries (mysteries with book/archive/library connections).
Bloody Words – Conference for readers and writers held in Canada every year. Program, news and updates, list of attendees, and registration details are included.
Books ‘n’ Bytes – Reviews, links, and information about authors, conventions, and awards.
ClueLass – Contains information about awards, events, groups, new books, bookstores, magazines and other mystery websites.
Detectives on Stamps – Nicaragua issued a series of postage stamps portraying a dozen fictional detectives.
The Early Whodunit – Traces the development of the early whodunit in both mystery and conventional literature of the late 18th and early 19th centuries.
Funny But Fatal – Guide to funny mystery novels. Includes a bibliography and reviews.
Golden Age Mysteries – Message board for fans of mysteries in the classic tradition, including those written by Ellery Queen, Dorothy L. Sayers, John Dickson Carr, and Agatha Christie.
Holidays Can Be Murder! – List of holiday-theme murder mysteries and their authors, categorized by holiday.
I Love a Good Mystery – Blog by a fan of mystery novels and crime fiction. Includes book reviews, author updates, genre news, and links to related content.
Looking for a Mystery? – A guide to both the history of the mystery novel and to locating modern mysteries by topic and style.
Magna cum Murder – Annual crime fiction festival. Includes list of featured guests, event history and a registration form.
The Mean Streets – A weblog featuring reviews, news and views related to new and classic mystery and hardboiled fiction.
Mormons in Mystery Novels – Mormon and Utah-based fictional detectives, and the mystery novels in which they appear.
Mostly Links Mystery Site – Links to sites dealing with mystery authors, books, publishers and book stores.
Mysteries (About.com) – Information about books and their authors, interviews, live chats, weekly features, and book reviews.