The Jolley Rogers and the Ghostly Galleon by Jonny Duddle

Matilda is a girl that lives in a coastal town that has been plagued by pirates. She is friends with Jim Lad who is the son of the captain of the Jolley Roger, a fairly friendly pirate ship and crew.  When the Jolley Roger is accused of the theft of valuables from the village museum, Matilde and Jim Lad set out to discover who the real culprits are and how to stop them.

This is an intermediate that has received some starred reviews.  I didn't think it was particularly spectacular, but it was a cute story appropriate for the 2nd-3rd grade target audience.  It has a little bit of danger, a little swashbuckling, but mostly, just a successful completion of a mission.  It has cute cartoony illustrations that match the lighthearted mood of the writing. (123 p.)