I would recommend Traction by Gabriel Weinberg
Lean Analytics. Hands down.
Plus 1 for Traction! I would say it's the best marketing book I've read (and in my top 2 for any new entrepreneurs along with 'The Mom Test' - book on idea validation)
I second the books, Lean Analytics and The Mom Test. Also, Hooked (maybe it's more of a product book) by Nir Eyal is a good one as well.