Dick has a baritone ukulele book out. I bought one right away as I like to support anyone who supports the bari-uke playing community. It has a good selection of songs in large font with chord diagrams. The songs are of a vintage variety and have short tales to go along with them. Best of all the chords will build many an intermediate player's knowledge of chords up and down the neck.
The book is a quality publication by the Hal Leonard Corporation and sells for about $20.
Hal Leonard link.