Ready to get your jazz chops in order? Hal Leonard’s latest offerings for bassists include two bop-inclined volumes, each with its own merits. Charlie Parker for Bass is packed with the heads and sax solos for 20 classic Bird tunes, arranged for bass (yes, “Donna Lee” is here, and yes, there’s 4-string tab). Larry Dunlap’s The II–V–I Progression, meanwhile, takes it up a notch with detailed instruction on that ubiquitous progression, including chords and scales, major and minor progressions, patterns and variations, and practice tunes. It’s actually four books in one: The material is customized for Bb, Eb, C, and bass-clef instruments. Best of all, there are two play-along CDs with removable bass parts.