Book Camera. So it looks like a plain ordinary book, but comes with an embedded pinhole camera, tiny microphone and remote controlled video recorder. Instructions include placing it on bookshelf or coffee table. After which you can enjoy watching the librarian in your life picking their nose or somesuch. £644.99 (SD memory card extra).
Concealed in a book with the pinhole lens and tiny microphone inserted into the spine, the whole package, including the miniature remote controlled video recorder/monitor, is housed within the book itself. Simply place this on a bookshelf or just leave it lying around and no-one would ever spot its real purpose. Amazingly clear colour CCTV images with sound. All recordings can be date and time stamped.