A handful of books come up again and again on my calls, here's what I actually recommend, and why.
'Never Split the Difference' by Chris Voss, still the best book on negotiation I know, built on real hostage-negotiation tactics that translate surprisingly well to enterprise deals.
'The Challenger Sale' by Matthew Dixon and Brent Adamson, the research behind why teaching and pushing back on a prospect outsells simply being liked.
'SPIN Selling' by Neil Rackham, the original, still the clearest explanation of how to structure a discovery conversation around a prospect's actual pain.
'To Sell Is Human' by Daniel Pink, a good one if you're moving into sales from another discipline and want to understand why selling isn't sleazy, it's just moving someone else.
Read one properly rather than skimming all four. If you can talk about how you've applied it, not just that you've read it, that's what shows up well on a call or in an interview.

