Being a techy who has become a sales person over the years and running my own companies (which is the ultimate in having to sell) I can highly recommend Closing is NOT your problem (1). It cuts through the fluff and breaks down the Sales process into identifiable steps that actually allow you to spot and FIX what is wrong in any sales cycle you are doing.

1) https://www.amazon.com/Closing-Your-Problem-Lisa-Terrenzi/dp...