The product is a vintage 90s collectible book titled "Guitar Scales in Tablature" by William Bay, published by Mel Bay in 1992. This workbook focuses on music theory specifically for guitar players, making it a valuable resource for beginners looking to improve their skills. The book features a collection of scales in tablature, providing a comprehensive guide for musicians looking to enhance their technique and knowledge of music theory. A must-have for any guitar enthusiast, this publication offers a unique and informative approach to learning and practicing scales on the guitar.