Jack Grassel
Jack Grassel is an American jazz guitarist, teacher, and author from Milwaukee, Wisconsin. Career 

With a family to support, Grassel turned to teaching music and playing jazz locally. He worked with Rosemary Clooney, Slide Hampton, Stanley Jordan, Ed Thigpen, and Nancy Wilson. He created the Occupational Music degree program at Milwaukee Area Technical College and wrote the books Big Ax and Super Ax. He formed Frozen Sky Records. As a result of the first two records of his compositions "Magic Cereal" and "If You're Too Crazy", he was featured in the New Talent section of Guitar Player magazine and became a contributing writer. He later invented an instrument he named the "SuperAx" which contained both guitar and bass guitar strings. His friend, guitarist Kirk Tatnall, built one, too, and they recorded the album Live at the Uptowner with their hybrid instruments. The Hofner guitar company hired Grassel to record a promotional album, Guitar Smoke. In 2000, readers of Guitar One magazine voted Grassel "one of the 10 best guitarists in America." He married vocalist Jill Jensen, and they recorded five albums: Seems Like Dreams, It's About the Music, Snow People. Live at the Carlton Grange and Jack and Jill Jazz. Discography 
 Magic Cereal (Frozen Sky, 1986)
 If You're Too Crazy for You Body (Frozen Sky, 1989)
 Solo Burner (Frozen Sky, 1993)
 Christmas Presence (Frozen Sky, 1998)
 Guitar Smoke (Frozen Sky, 2001)
 Live at the Uptowner (Frozen Sky, 2002)
 Thunderstones (Frozen Sky, 2002)
 Matrix (Frozen Sky, 2003)
 Two Guys with Guitars (Frozen Sky, 2004)
 Ghost Ridge (Frozen Sky, 2002)
 10 (Frozen Sky, 2006)

Bibliography
 1974  Guitar Seeds
 1976  Monster Chops
 1992  Power Practicing
 1994  Big Ax
 1996  Super Ax
 1998  Jazz Guitar Favorites
 1998  Jazz Guitar Classics
 1998  Jazz Guitar Standards
 2002  Jazz Rhythm Guitar
 2004  Brain Training
 2004  131 Axercises
 2008  70 Jazz Compositions
 2020  The Reharmonized Real Book

References 

1948 births
Living people
Milwaukee Area Technical College people
American jazz guitarists
20th-century American guitarists