Ultimate Contemporary Rhythm Keyboard Grooves by Andrew D. Gordon will give you an insight into how keyboardists play rhythm keyboard grooves in many different styles of contemporary music such as: Pop, Rock, Blues, Jazz, Funk, R&B, Latin, Gospel, New Age, Reggae, Calypso. Each of the 21 grooves is broken down into patterns ranging from 3 up to 16 with over 150 patterns in total. Each groove uses a chord progression that is commonly used for that style of music and generally starts off with a simplified pattern and as you progress through the groove, the patterns become more complex both rhythmically and harmonically.