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Candlewick Press, February 14, 2017 
ISBN: 978-0-7636-8828-8 (Hardcover)

ISBN: 978-0-7636-9739-6 (Paperback - coming August 2019)


Book 2 in my Evil Librarian trilogy!


"Knudsen brilliantly combines just the right amount of witty, dark humor with truly heart-pounding horror to keep the reader racing to turn the page. Fans of both humor and horror will find a great match with this book and will likely be pulling for a third installment."

VOYA Magazine

Candlewick Press, April 12, 2016
ISBN 978-0-7636-7436-6 (Hardcover)
ISBN 978-0-7636-9456-2 (Paperback)

Book 3 in my Trelian fantasy trilogy!

"Begun in 2009 with The Dragon of Trelian, this excellent fantasy trilogy finally receives a worthy ending." —Booklist

Candlewick Press, March 10, 2015
ISBN: 978-0-7636-6011-6 (Hardcover)
ISBN: 978-0-7636-9301-5 (Paperback)

Some of the kids in Marilyn’s class have monsters. Marilyn doesn’t have hers yet, but she can’t just go out and look for one. Your monster has to find you. That’s just the way it works. Or ... is it?

"Rich with feeling, it’s a warm, gently funny reminder to chase down one’s dreams, rather than waiting for them to appear on the doorstep." —Publishers Weekly (Starred Review)

Candlewick Press, September 9, 2014
ISBN: 978-0-7636-6038-3 (Hardcover)
ISBN: 978-0-7636-7640-7 (Paperback)

Winner of the 2015 Sid Fleischman Award for Humor!

He's young. He's hot. He's also evil. He's ... the librarian.

My first YA novel: a funny, creepy, demon-filled, musical theater horror romance adventure.

Stephenie Meyer(!!!), author of the bestselling Twilight Saga, describes it as "Hysterical! Smart and funny, with a little drama, a little romance, and just the right touch of evil."

Candlewick Press, August 2012 (Hardcover)
ISBN: 978-0-7636-4990-6

A laugh-out-loud funny story about not worrying what others think — even if you’re big and tough, and your friends are fuzzy and cute.

"Even the toughest readers will crumble under the appeal of these bunnies." —Kirkus

Selected as one of Amazon's best books of the month!

Candlewick Press, April 2012
ISBN: 978-0-7636-5062-9 (Hardcover)
ISBN: 978-0-7636-9455-5 (Paperback)

It's the sequel to The Dragon of Trelian! The continuing adventures of Meg, Calen, and Jakl, with new friends, old enemies, new dangers, more magic, more excitement, and lots of surprises.

"Wonderful characters ... fluid writing .... Fans will eagerly await the climactic confrontation between forces in the next book." —The Horn Book

Candlewick Press, February 22, 2011
ISBN-10: 0-7636-3790-3
ISBN-13: 978-0-7636-3790-3

Mrs. Henshaw's class is hatching eggs for a science project. Sally's egg looks . . . different.

"Knudsen (Library Lion) never overplays her hand, but lets the story's laughs unfold naturally from the characters and circumstances. Her grasp of the life of the elementary school classroom is spot-on; this should become another favorite." —Publishers Weekly, starred review

Candlewick Press, March 9, 2010
ISBN: 978-0-7636-3789-7 (Hardcover)
ISBN: 978-0-7636-4877-0 (Paperback)

How many different ways can ten leading middle-grade authors tell a story including the line "I fooled you"? Prepare to be surprised!

Candlewick Press, April 2009 (Hardcover)
ISBN: 978-0-7636-3455-1
January 2011 (Paperback)
ISBN: 978-0-7636-9454-8

A middle-grade fantasy adventure involving a princess, a mage's apprentice, a dragon, a hundred-year war, several secrets, old grudges, new enemies, lots of danger, a little romance, and an evil plot against the kingdom of Trelian that must be stopped at all costs!

The Dragon of Trelian was a Summer 2009 Kids' Indie Next List selection!

Kane Press, February 2008
ISBN: 978-1-57565-259-7

Bzzzzzzzzzzz! The mosquitoes are attacking, and Riley's on the run! Can he find a way to make himself bug-proof once and for all?

Candlewick Press, July 2006
ISBN: 978-0-7636-2262-6 (Hardcover)
ISBN: 978-0-7636-3784-2 (Paperback)

A picture book story about what happens when, one day, a lion comes to the library...

"This winsome pairing of text and illustration is a natural for storytime and a first purchase for every collection." —School Library Journal (Starred Review)

Little Simon, February 2006
ISBN-10: 0-689-87894-X
ISBN-13: 978-0-689-87894-7

Discover all the fun of Easter morning with this shimmery, shaped book!

The Kane Press, January 2006
ISBN: 1-57565-167-X

It's gross! It's aliiiive! After a moldy mix-up, Jeff has to do the unthinkable—and fast!

The Kane Press, July 2005
ISBN: 1-57565-157-2

2006 NCSS-CBC Notable Social Studies Trade Book

Carl complains about everything, until he discovers how to turn complaints into action!

Little Simon, April 2005
ISBN: 0-689-86381-0

Real ribbons adorn the pages of this unique board book that tells the story of two little girls getting their mother ready for her special day.

Candlewick Press, April 2005
ISBN: 076362457-8
ISBN: 076362456-X (Library Binding)

Based on what experts know about how children learn to read, Brand New Readers—published by Candlewick Press—are short, funny stories with words and pictures that help children reading for the first time succeed—and have fun!

The Kane Press, July 2004
ISBN: 1-57565-144-0

Yuck! Dan thinks earthworms are gross...until one of them hitches a ride in his pocket and creates a sensation at school!

The Kane Press, July 2003
ISBN: 1-575-65127-0

Is the creepy new girl at school really a vampire? Molly and her friends are determined to find out!

Little Simon, February 2003
ISBN: 0-689-85311-4

Read-aloud rhyming text with adorable art and shimmery fabric patches.

Little Simon, January 2002
ISBN: 0-689-84726-2

Bunnies love to paint Easter eggs! Each one picks a springtime color for an EGGstra-special Easter!

Little Simon, January 2002
ISBN: 0-689-84725-4

Little bunnies are decorating an Easter basket! Hop along and see what each bunny brings to add to the holiday fun!

Little Simon, September 2001
ISBN: 0-689-84401-8

Read-aloud rhyming text with adorable art and shimmery fabric patches, all with a silly Halloween theme.

Random House, August 1999
ISBN: 0-679-89443-8

An adaptation of Raymond Briggs' classic, award-winning, wordless picture book.

BOOKS NO LONGER IN PRINT (Check libraries and used book stores)

Little Simon, January 2006
ISBN-10: 0-689-87099-X
ISBN-13: 978-0-689-87894-7

Random House, September 2003
ISBN: 0-375-82215-1

Fairy Friends
Little Simon, April 2003
ISBN: 0-689-85629-6

Princess Party
Little Simon, April 2003
ISBN: 0-689-85630-X

Little Simon, October 2001
ISBN: 0-689-84402-6

Golden Books, September 2001
ISBN: 0-307-45502-5

Random House, July 2001
ISBN: 0-375-81090-0

Golden Books, June 2001
ISBN: 0-307-26115-8

Random House, June 2001
ISBN: 0-375-80665-2

Golden Books, April 2001
ISBN: 0-307-45410-X

Little Simon, January 2001
ISBN: 0-689-83783-6

Little Simon, January 2001
ISBN: 0-689-83784-4

Random House, October 1999
ISBN: 0-679-89481-0

Godzilla: Monster Coloring Fun! (Random House, May 1998. ISBN 0-679-89204-4)

Godzilla: Adventures to Color! (Random House, May 1998. ISBN 0-679-89205-2)

Godzilla: Monster Coloring, Mazes, and Games! (Random House, May 1998. ISBN 0-679-89207-9)

Godzilla: Monster Coloring, Puzzles, and Codes! (Random House, May 1998. ISBN 0-679-89206-0)

Galactic Puzzles and Games (Random House, April 1999. ISBN 0-375-80018-2)

Droids, Creatures, and Vehicles Coloring Book (Random House, August 1999. ISBN 0-375-80015-8)

Jedi Missions to Color (Random House, August 1999. ISBN 0-375-80024-7)

Jar Jar’s Coloring Fun (Random House, April 1999. ISBN 0-375-80023-9)

Anakin’s Adventures to Color (Random House, April 1999. ISBN 0-375-80022-0)

Heroes and Villains Coloring Book (Random House, April 1999. ISBN 0-375-80021-2)

Random House, January 1998
ISBN: 0-679-88912-4

Random House, January 1998
ISBN: 0-679-88908-6