Hi Does anyone has the ISBN of the latest edition of these 4 books by any chance ? I think I found the first two, but I'm not sure they refer to the latest edition: Author: Adam Osborne An introduction to microcomputers : Vol.0: The Beginner's Book - 093198808X Vol.1: Basic concepts - 0931988349 Vol.2: Some real microprocessors - ? Vol.3: Some real support devices - ? If you want to sell me your copy, drop me a mail. Thank you -- Stephane http://updatedoften.blogspot.com