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Dig It Up! Mysteries From the Past ; Discover It!  Science Mysteries ; Detect It! Super Summer Sleuthing ; Find It!  Explain It! Real Life Mysteries ; Solve It!  Codes, Ciphers, and Other Puzzlers  from the Outagamie Waupaca Library System's (WI) Get a Clue @ Your Library webpage

History Mystery Books compiled by Tini Maier, Buckman Elementary School (Portland, OR), on the PBS Kids website.

Mysteries a list broken down by age levels - Babies, Toddlers, Preschool, Primary (K-3), Intermediate (4-6) and Adult – from BookHive : Your Guide to Children's Literature and Books at Public Library of Charlotte-Mecklenburg County (Charlotte, NC).

Mystery Books  – three categories: Picture Books, Chapter Books,Series Mystery Books -  from State Road Elementary Library, Webster Schools, NY.

Mystery Booklist - Grades 1 and 2, Grades 3 and 4, Grades 5 and Up -  from The Ferguson Library (CT).

Mystery Booklist - Fiction, Easy Fiction, Easy Readers, Picture Books -  from the Morton Grove (IL) Public Library's Webrary.

Mystery / Detection / Suspense  - links to other online mystery links from the Waterboro (ME) Public Library

Mystery : Younger Readers  - from the Los Angeles (CA) Public Library

Solve it @ the Library: Mysteries for Kids and Teens from the Multnomah County (OR) Library

Get a Clue!  Mystery Books for Grades 4-6  from the Smithtown (NY) Library

Mysteries for Grades 3-6  from the Lockport (NY) Public Library

Mysteries for Middle Schoolers  from the Berkeley (CA) Public Library

Mysteries for Older Readers, 4th-6th Grades  from Sonoma County (CA) Library

Mystery  from the Lake Oswego (OR) Public Library

Top Mystery/Suspense For Teens  from the Evanston (IL) Public Library

Who Done It? Mystery booklist for 6th Through 8th Graders  from the Menomonie (WI) Public Library

Teen Detectives  from the Kansas City Public Library