Sharon Drew Morgen's book Selling with Integrity. Selling with Integrity , the author's second book on professional selling, may just be the most important contribution to the field in decades. Morgen has an uncanny understanding of why people buy.
Relationship comes first, task second.
People buy only when they can't fill their own needs. People buy using their own buying patterns, not a sellers selling patterns. What we really have here is a new paradigm capable of restoring the selling profession to its rightful place which is one of respect, spirituality, servitude, and a win-win philosophy. If you're serious about your career in selling, then buy this book, read it, and re-read it.