This book & 3 CD's features 10 duets for two altos, two tenors or alto & tenor saxophone. Like all of Greg's books, the rhythm section plays all of the pieces in 2 different keys, allowing both alto & tenor players to read the same written part. This unique feature ensures that the parts lay perfectly on all saxophones. In addition, the second half of the book features the duets arranged for alto and tenor, making this one of the most flexible duet books on the market.