The One Week Marketing Plan by Mark Satterfield - http://amzn.to/1mwTArB - covers the basics of creating a lead magnet, landing page, and drip email campaign.
Launch by Jeff Walker - http://amzn.to/1NYgykw - covers his Product Launch Formula which includes Pre-Sales prior to Product Creation (very Lean) which he calls Pre-Launch and, List Creation, JV Marketing, This is very classic and I see many successful businesses using this technique.
Landing Page Optimization - http://amzn.to/1NYgTnf - by Timothy Ash is classic. I went to one of his talks in person in San Diego. Very valuable.
There are a bunch of books on Content Marketing. I follow Dan Norris on Facebook, etc. http://dannorris.me/ You should consider his books - Content Machine and 7 Day Startup. Also, Inbound Marketing by Brian Halligan and Dharmesh Shah is the classic in this arena.
Melyssa Griffin of the Nectar Collective teaches a Pinterest Marketing Course worth considering - http://courses.thenectarcollective.com/courses/pinfinite-growth
Traction - http://amzn.to/1RXsUNJ - by Justin Mares and Gabriel Weinberg of DuckDuckGo.com is a must read for identifying the right channel at your current stage. I had Justin come speak the the San Diego Tech Founders Meetup in November. Was awesome! http://justinmares.com/
Mariah Coz of Femtrepreneur.co is a Rockstar at using Webinars to grow your business and teaches a course on how to do killer webinars called, wait for it, Webinar Rockstar - http://www.webinarrockstar.co/ Her main site is here - http://www.femtrepreneur.co/