Author Adam Gidwitz, from Grimm, Grimmer, Grimmest, is giving a talk this week to celebrate the release of his new book: Max in the House of Spies

For more information about the event on Wednesday, March 13, please visit cellardoorbookstore.com

And order Max in the House of Spies, available now!

Opal overcomes her fears and discovers a family treasure.

Opal has an illuminating encounter with a suspect and makes progress with her big case.

Opal and Frank uncover the shocking motives of their mysterious neighbor.

Opal ventures outside of her comfort zone in pursuit of a suspect.

Someone close to Opal leaves home just as she takes on her biggest case yet.

Opal is surprised when her latest case reveals a secret about her dad.

Opal spends time with a new teacher and gets to the bottom of a misunderstanding at school.

As Opal's case continues, it leads her to an unexpected place.

An old friend asks Opal for help tracking down something special.