Pippa Parvin and the Mystery of the Missing Quill Pen: A Little Book of BIG Choices - Pippa the Werefox, #8

When a priceless artifact disappears, a play-date becomes an investigation. You and Pippa are at your friend, Robert's, manor house when his family discovers that an antique quill pen is missing. Robert's great-great-great grandfather cut the quill himself and presented it to your great-great-great grandfather, his loyal game warden. You, Pippa, and Robert are all heartbroken at its loss. But Pippa's on the case, and she needs your help.
Will you question witnesses first, or try to decipher a cryptic piece of paper left in the quill's place? Pippa will follow your lead. See if you can crack the case before Pippa does!