There is only one book I can say has changed my life and this is it.
The techniques, the attitudes and the whole selling ethos are in there. At the beginning of the book there are stories about people who learnt true selling practices and went on to become successful, and I remember really wanting to be like those people. So I read the book a few times, adopted every lesson and dumped my preconceptions in favour of Tom Hopkins view of what selling is all about. I started selling; started earning good money and haven't really looked back since. I still re-read parts of this book to remind myself what made me successful.
If you're in sales this is worth the money 100,000 over. Yes it is cheesy and the language is dated, but the results are very real... and you will enjoy the cheesy prestige and the cheesy money that comes with success.