+ This Won't Scale by @Drift
+ Positioning by Al Ries & Jack Trout
+ Crossing the Chasm by Geoffrey Moore
+ Obviously Awesome by @aprildunford
+ Competing Against Luck & The Innovator's Dilemma by @claychristensen
cont.
+ Breakthrough Advertising by Eugene Schwartz
+ Influence & Pre-suasion by @RobertCialdini
+ Ogilvy on Advertising by David Ogilvy
+ Made to Stick by Chip and Dan Heath
+ The Copywriter's Handbook by @Robertbly