My most recent close encounter with the art of Mati Klarwein was (in 2007) while I walked my way through Summer of Love exhibit at Whitney Museum in New York.
His mix of mysticism, fertility and an open view of the world was on display.
I am sure that fans of Miles Davis, Santana and others will be happy to find Mati & The Music: 52 Record Covers 1955-2005 (RM/Librairie 213, October 2012, distributed by D.A.P ) in their holiday gifts.
You might also like Electrical Banana, Masters of Psychedelic Art (Damiani, February 2012) with foreword by Paul McCartney.