I just saw this, and it has only 5 hours to go. The book is by Struthers Dunn on relay engineering and is what I have. This is really good if you want to look into relay differences and about re-winding coils. Link; http://cgi.ebay.com/Relay-Engineeering-Struthers-Dunn-Inc_W0QQitemZ4639326712QQcategoryZ378QQrdZ1QQcmdZViewItem