The book is now available. ISBN = 0521592712. Probability theory is developed as an extension of deductive logic to statements which are not true or false, but rather have degrees of plausibility. If you use statistical methods, and would like to understand how and why (and maybe even if) they work, you will want to read this book. Gene __________________________________ Do you Yahoo!? Yahoo! Calendar - Free online calendar with sync to Outlook(TM). http://calendar.yahoo.com