Wes Bush: Product-Led Growth
You can focus your market approach to product led growth or sales lead practices. If you go with a product, the book can help you.
April Dunford: Obviously Awesome; How to Nail Product Positioning so Customers Get It, Buy It, Love It
Obviously awesome is a practical guide on mastering positioning of your product or your company. Great overview on how to do better the most important part in selling.
Eisha Tierney Armstrong: Productize
Productize services. If professional services companies want to move from customized services to product sales, this is a book for them.