This book is a thrilling addition to The Three Investigators series, written by William Arden. Set in the year 1982, the book is a digest paperback with a weight of 5.4 Oz and 192 pages. The story revolves around the Mystery of the Purple Pirate and is filled with action and adventure, making it perfect for readers of all ages.

The book is in English and published by Random House Children's Books. The genre of the book is non-classifiable and juvenile fiction, covering topics that include pirates and general adventure. With its captivating storyline and interesting characters, this book is a must-read for anyone who loves mysteries and thrillers.

Keyhole edition.