You are not going to make perfect landings just by reading this book but it does add all the tips and tricks your Instructor didnt mention.
Almost anyone can take off in a light aircraft (it almost does this bit by itself really, thats why Instructors let you do this on the first lesson). Anyone can get by doing turns of a sort but the planning, preparation and execution of a good landing is what defines a good pilot.
I think this excellent little book covers this particular skill under all the circumstances a private pilot is likely to encounter from Hedgerow to Heathrow.
Far cheaper than a heavy landing inspection fee too.