The ability to play the blues and rhythm changes are certainly some of the most important skills to have as a jazz player. Transcribing basslines and solos yourself in the forms is very helpful if you also analyze how the notes and phrases fit the chords.
There are lots of pre-transcribed solo and bassline books including the excellent series by Jim Stinnett. They are available at
www.jimstinnett.com
John Racina has written some nice etude books:
Supplementary Jazz Studies Volume 1 ~ # 101 Blues Riffs, Supplementary Jazz Studies Volume 4 ~ # 104 Blues Etudes, Patterns and More (Treble Clef Instruments), and Supplementary Jazz Studies Volume 3 ~ #102B Jazz Etudes to Rhythm Changes. They are available on his website:
www.johnracinamusic.com
