Arthur Benjamin, a renowned "mathemagician" and professor at Harvey Mudd College, is famous for blending mental mathematics with magic to make math engaging, often through books like The Magic of Math and Secrets of Mental Math. While he has written several popular books on this topic, there is no widely recognized 12-volume series titled "Math and Magic" authored by him. 

Key Books by Arthur Benjamin:

The Magic of Math: Solving for x and Figuring Out Why (2015): A comprehensive, popular book explaining concepts from arithmetic to calculus with a magical twist.

Secrets of Mental Math: The Mathemagician's Guide to Lightning Calculation and Amazing Math Tricks (2006): A guide on how to perform fast mental calculations and tricks.

Think Like a Maths Genius (2011): Covers mental calculation methods and memory tricks.

Proofs That Really Count: The Art of Combinatorial Proof (2003): A more academic text on combinatorics. 

Commonly Associated Resources:

The Teaching Company (Great Courses): Benjamin has created courses for The Great Courses, which are often structured as a series of lectures or "volumes" (e.g., The Joy of Mathematics), which might be confused with a 12-volume set.

"Mathemagics" Appearances: He is known for demonstrating lightning-fast calculations in his head. 

The most likely reference is to his popular books or his video lectures from The Great Courses, rather than a 12-volume book set of that exact name.