Hi, I just received the invoice from Lightning Source ($12) to keep the book listed in bookstores (e.g., Amazon) for another year, and of course I welcome purchases of a printed copy of the book. However, to tell you (or perhaps to remind you if I have told you this before), that a PDF of the book is available for free download -- see the link in the third paragraph at http://walden-family.com/bbn/ Do take a copy for your own use (and for digital searching). (I posted the free copy on the web a while back, once the sale of printed copies had covered the development costs of the book.) Dave -- home address: 12 Linden Rd., E. Sandwich, MA 02537 home ph=508-888-7655; cell ph = 503-757-3137 (often don't carry it) email address: dave@walden-family.com; website: <http://www.walden-family.com/bbn/>http://www.walden-family.com/