After reading some reviews I was hesitant in ordering this book, but I did and I am glad I did. Some criticism was aimed at small size and lack of description of each mechanism, BUT, this contains 1800 mechanical movements, YES 1800, the book would have to be as big as a house to contain comprehensive detail and diagrams on 1800 mechanisms.<br><br>As an off the shelf reference book or just to thumb though while enjoying a coffee, this is a great book, the concise nature of each diagram and description means it covers an immense range of mechanical movements and I suspect I will be thumbing through this book in quiet moments for many months.