"Every farmer, every laborer, every fisherman can both read and write — and we think that books instead of being locked up in cupboards, far from the sight of students, should be distributed as widely as possible. The books of our library are therefore
passed from hand to hand without returning to the library shelves perhaps for years."
Hi, insout2011, and welcome! Perhaps you should read the site FAQ about using BookCrossing to advertise your books, though. Posting advertising links as you've done here, without making any attempt to actually participate in site discussions, isn't appropriate.
If you wanted to register a copy of your book on BookCrossing and release it into the wild, that would be a perfectly acceptable way to share your work!