I'm halfway through Feld and Mendelson's Venture Deals and earlier this year worked through Ittelson's Financial Statements.
Having cofounded a startup that raised investor money before, I can state confidently that both are going to make me better at what I do next time I start something.
Of course, they're not books about "what to do", just "how people do the basics". Which is harder because there's less ambiguity to hide behind. Sometimes my eyes glaze and I need to put them down and wait for a time when I have more energy.