Michael Walker's YouTube Channel currently features a photo of him on my homeground of the San Francisco Bay Area. He recently put out two books for classical music set up for play on the Low D baritone ukulele. I have already received the first book, Classics for the Baritone Ukulele.
Now there's a new Selected Pieces by Johann Kaspar Mertz for Baritone Ukulele.
The books look to be of very high quality and are surely a welcome addition to my baritone ukulele library. The links are to Amazon dot com only because they are convenient but also allow one to have a "peek inside."