Fantastical Prospecting is a well-rounded book on prospecting and sales. I like the advice on leveraging text messaging and social media for prospecting. The section in chapter 9 on building familiarity and the number of touches required was helpful and a good mental model to be aware of.

This episode is also available as a blog post: https://jsilva.blog/2019/02/27/fanatical-prospecting-summary/