Kids: Books and Reading: Middlegrade:Series!

Clever competitions, puzzling mysteries, and similar whip-smart series.

THE BOOK SCAVENGER  series by Jennifer Chambliss Bertman (start with The Book Scavenger)

MR. LEMONCELLO'S LIBRARY series by Chris Grabenstein (start with Escape from Mr. Lemoncello's Library)

THE MYSTERIOUS BENEDICT SOCIETY series by Trenton Lee Stewart (start with The Mysterious Benedict Society)

THE CANDYMAKERS series by Wendy Mass (start with The Candymakers)

THE SECRET series by Pseudonymous Bosch (start with The Name of this Book is Secret)

YORK series by Laura Ruby 

...Also try THE GAUNTLET by Karuna Riazki and  THE WESTING GAME by Ellen Raskin--not series, but great stand-alones

Great action, adventure, and fantasy series to try after you've torn through Harry Potter and Rick Riordan (or even if you haven't). Recommended by Library Pages and staff.

THE ACCELERATI TRILOGY by Neal Shusterman (start with Tesla's Attic)

THE BOOKS OF BEGINNING series by John Stephens (start with The Emerald Atlas)

THE CHRONICLES OF PRYDAIN series by Lloyd Alexander (start with The Book of Three)

EIGHTH DAY series by Dianne K. Salerni (start with The Eighth Day)

FABLEHAVEN series by Brandon Mull (start with Fablehaven)

THE FIVE KINGDOMS series by Brandon Mull (start with Sky Raiders)

INKHEART trilogy by Cornelia Funke (start with Inkheart)

KEYS TO THE KINGDOM series by Garth Nix (start with Mister Monday)

MAGISTERIUM series by Holly Black & Cassandra Clare (start with Iron Trial)

MARK OF THE THIEF series by Jennifer A. Nielsen (start with Mark of the Thief)

THE MISSING series by Margaret Peterson Haddix (start with Found)

NEVERMOOR series by Jessica Townsend (start with The Trials of Morrigan Crow)

RANGER'S APPRENTICE series by John Flanagan (start with The Ruins of Gorlan)

SEPTIMUS HEAP series by Angie Sage (start with Magyk)

SHADOW CHILDREN series by Margaret Peterson Haddix

     (Dystopian, not fantasy. Start with Among the Hidden)

SPIRIT ANIMALS series by [Various] (start with Wild Born)

THE UNDERLAND CHRONICLES series by Suzanne Collins (start with Gregor the Overlander)

UNWANTEDS series by Lisa McMann (start with The Unwanteds)

WINGS OF FIRE series by Tui T. Sutherland (start with The Dragonet Prophecy)