College auditions, and music competitions such as NYSSMA (New York State School Music Association) solo's for guitar are typically in a Jazz setting. One of the books most popular for these solo's is Jim Snidero's Jazz Conception book for Guitar. The etudes in the book rank from level 3 to 6 (All State), and is a great tool for practicing sight reading as well.
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Here is a playlist of pretty much every possible guitar NYSSMA piece, performed by Chris Fury.