I have recently taken an interest in memory and how to use it effectively and this is a very good little book indeed. The trouble with the average memory is that it is not organised e.g. a question comes up in an exam which you know the answer but you cannot remember it, why? Because you do not know where to find it. Simple as that! This book teaches you to mentally file all your revision notes so that you can instantly recall the data at a later date. The book covers everything you need to know including numbers. O'Brian teaches his own version of 'pegging' information only he uses people to represent information which works exceptionally well. He states in his book that many people can recall exactly everything they have done today; what they have had for lunch how long they were waiting at the bus stop etc. So if this can be recalled with ease why cant facts and figures? Simple, because you haven't actually been there. O'Brian teaches you to remember information as if you were on a journey that way you trick your mind to believe you have been there. Sounds strange I know but this stuff realy works! I would recommend this book to anybody even if you are not taking exams, for just under a fiver you can't go wrong. My memory has certainly improved! Anything I file into it stays there!