'Piece of Mind' when I was about 14 or 15

By the way, I first read your book 'Piece of Mind' when I was about 14 or 15 and it had a really big impact on me. I used your techniques throughout my secondary schooling to good effect. I have raved about the book to anyone who would listen ever since (and evidently, at some stage, someone has borrowed my copy and not returned it - but thankfully I now have a Kindle version instead!).
Now, at age 35, I am hoping to revisit the lessons I learnt over 20 years ago... You are one of my heroes! Thanks for inspiring me.  HM, Vic.