If you want to learn how to be good at B2B marketing you need to understand that you always market to people first. People sign checks and place orders, not businesses.

That said, I would highly recommend you read all books and ebooks by Seth Godin and subscribe to his blog:
http://www.sethgodin.com/sg/books.asp

Now, the key to B2B marketing is trust. Decision makers must trust you and your business to buy your products and services, without trust no one will buy anything from you. For this, I recommend Trust Agents by Chris Brogan and Julien Smith.

On the subject of persuasion, to learn how to be persuasive in marketing and every day life, I highly recommend Fascinate by Sally Hogshead, it gets into details backed by research into 7 triggers to persuasion and captivation.

A good primer, if you don't know anything about inbound marketing, is the Inbound Marketing book by Brian Halligan and Dharmesh Shah. It covers the basics of what it is and how to use it to get leads and sales.

Now, since David Meerman Scott wrote forward for the Inbound Marketing book I just mentioned, I do want to recommend his book as well - The New Rules of Marketing and PR.

This should keep you busy.