I bought this book Brain Power in 1991, from Kinokuniya bookstore in Singapore. The date was July 11th, 1991 as it was written at the back of my book. Counting this date to now 2016, that is a far stretch of 25 years. Have I benefitted from reading this book? Definitely, I learned a lot from it and may have applied subconsciously some of the concepts in the book.