10 Solo Pieces for Bass Guitar is a collection of original music written specifically for the bass guitar as a solo instrument. The difficulty of the music ranges from easy to advanced. You can play all the pieces on a 4-string bass. Of course an instrument with an even wider range works fine too. The book is a 22 page PDF in standard notation and tablature. There are recordings of all the pieces available on www.anakronfilm.com.
It's a 12 page PDF with solo pieces for bass guitar in standard notation.