Artist Danny Martin shows off his Tucson Neon Coloring Book during the first day of the Fourth Ave Winter Street Fair. It is a coloring book for adults and is so popular the first printing sold out within a week. Martin plans to sell the images as an eBook and release a second printing next month. The photo was taken in Tucson, Ariz., on Friday, Dec. 11, 2015. A.E. Araiza / Arizona Daily Star

A.E. Araiza / Arizona Daily Star

Local artist Danny Martin has a new coloring book, "Cowgals and Dudes" and will celebrate its release at Tap & Bottle, 403 N. Sixth Ave., this Friday. 

The project is a follow-up to his Tucson-themed neon sign coloring book (seen above), that he released in 2015.

The coloring fun runs from 6 p.m. to 8 p.m. Admission is free.