On the bookshelf, filled with favorite books,there is a quiet ticking. From the first time you can not see where the clock is. Only looking closely, you can see the arrows on the yellow book, between the numbers 12 and 6. Oh, and the adjacent books are called "three" and "nine", a coincidence or also part of the original clock? I found these interesting hours - books on Amazon for20 $. But according to the reviews of those who work they do not work very well and vaccinate, which is unacceptable for the watch. A perfect alternative for all DIY lovers will be to make similar watch for the bookshelf by yourself using a proven and accurate clockwork. The highlight of the watch is the imitation of real books withnames corresponding to the dial. For the version with your own hands you can use both real books and just hard bindings. You can make a bright cover and the necessary name yourself, and in the middle book you can build in the clockwork. A strict black-and-white version with three books of the same size is suitable for shelves with a series of books of classical literature.