Kogan books do a great job of rooting you in the specific subject and makign you knowledgeable in the topic, looking at it from the definition to the need for it and the context.

As someone who is self employed and only recently started my business I have read a number of "self help" books on building business.
I found this one to be well structured and informative.

Don't just be better, cheaper, faster. Be unique. Easier said than done, right? Creating a winning value proposition is no easy feat. This book presents a clear, step-by-step set of guidelines that will make easier to create a value proposition that attracts customers to the value you deliver. A must read for every entrepreneur struggling to identify what business they're in, and for whom.