Arnaud Maillet's study of the Claude Glass was informative and insightful in the main. As an artist and geometer I found all of the information contained in the book of great interest and instructive. As one who has of late been studying the subject of reflections and mirrors in general, as well as applications to the nuero-visual and geometric, this filled an improtant gap in my knowledge. It may not be a perfectly organized study but it is the only one I am aware of in English. It had the effect of my creating my own Claude Glass with a converse clock face glass cover and enamel black paint sprayed on the back. I have been enjoying experimentation with it since and will no doubt employ it in some art work. Any book that prompts one to use the information inside is a book worthy of reading I think. It seemed to cover the various areas of the subject; It's developement and history, occult use for scrying, as a device for reducing an image and also for
accessing the tonal values. I doubt I would require another book on the subject after reading and studying this one.