They Ask, You Answer is a good book, related, not about slide decks, but should help the funnel, and the deck nonetheless. It will help you turn the interactions and questions into answers, it will give you a process for doing this
Combined this with technique in the book They Ask You Answer by Marcus Sheridan and you should have a good starting point.
There is no perfection, only iteration, and the best source of learning is always to talk with users. It also helps to have deep domain experience and insights. Steve Jobs said something about the customerS not seeing leaps in innovation (in UX), so instead look to engineers for these. This is more when you are early in a product and see a large problem that could be solved a very different way than today.
To Sell is human
The little red book of selling
They ask, you answer
Nudge
