In this story without words, Molly must overcome her fear of the shadowy monsters that only she can see in order to return a lost book, and so make a new friend.

Penny feels guilty after taking a beautiful blue marble that she sees in Mrs. Goodwin's grass, but gets a pleasant surprise when she goes to return it the next day.

After Trixie and daddy leave the laundromat, something very important turns up missing.

Molly's parents try various methods to help her remember her mittens but nothing seems to work.

When her best toy mysteriously disappears, Olivia the feisty pig is determined to find out who is responsible.

While traveling with her family to Holland to visit her grandparents, Trixie once again loses her beloved Knuffle Bunny.

"Third-grader Aven Green has been solving mysteries for a whole month, cracking such cases as The Mystery of the Cranky Mom. But can this perceptive detective solve two cases at the same time? First her teacher's lunch bag disappears. Then Aven's great-grandma's dog goes missing. Fortunately, since Aven was born without arms, all the "arm" cells went to her super-powered brain instead. (That's her theory.)"--

"Splat notices that his favorite wooden ducks keep going missing--can Secret Agent Splat solve the mystery?"--

Harry and Doug investigate when special bookmarks begin to disappear while their class is busy studying poetry and running their own post office.

Help Jack and Meg solve the case of the lost cat! This story uses an engaging mystery story to encourage confidence in early readers. This book uses a combination of sight words and short-vowel words in repetition to build recognition. Original illustrations help guide readers through the text.