If I were to pick the one book for the new or established consultant, this would be it. In fact, I've purchased every edition of this that has been published, and given several additional away to others contemplating consulting as a career. I'm a practicing full-time consultant (medical devices, regulatory affairs) for the past 10 years, and have re-read this book many times and still find points to implement, refresh my thinking, and reaffirm my committment to the field of consulting. I have purchased virtually all of Weiss' books and have never been disappointed, as well as most other books on consulting. For general reference, I still rate this the best, with his other general book on consulting, "Getting Started In Consulting" a close second. Why? Because his emphasis of value based pricing, project pricing, obtaining fees up front. While these are not new, they are still not practiced by many consultants (fear?) and failure to implement has probably caused most of the failures in our profession (with technical expertise a given, of course). Whenever I choose not to follow that advice, at least I go in knowing the risks. Rereading this type of book allows me to reevaluate, usually annually, together with my business plan update, that I'm on track, or warns of the need to get rid of any bad business habits that have crept in.