"We all know books burn -- yet we have the greater knowledge that books cannot be killed by fire. People die, but books never die. No man and no force can abolish memory... In this war, we know books are weapons."
How do I send a book to someone that has it on their wish list? I found someone that has a "wish" for a book I own, how am I able to see their address to mail it to them?
If you would like to offer to send someone a book, you can contact them directly to request their address - if they have Private Messages enabled you will see a "send thus-and-such a private message" link on the upper right of their BookCrossing profile page, and you can click on that to send a message. Do note that not all wishlists are up to date, and not all BCers are still active, so you may not get a response or may learn that the person no longer wants that particular book. [It doesn't hurt to include a time limit in your message - "If you'd like the book, please send me your address within X days", that kind of thing - so that if you don't hear back within that time you can offer the book elsewhere, or wild-release it, without worrying about a late response.]
You might want to browse the Random Acts of BookCrossing Kindness forum and the Bookring/ray/box forum; the former is a good place to offer books or to request trades, and the latter would be good if you have a particular book that lots of people seem to want. [If you have lots of books you'd like to send traveling, you could offer a mixed box to someone who manages an OBCZ or a Little Free Library.]
And do consider releasing a few books in the wild. Even if there isn't much BC activity near you, there may be other inactive members around who'd be delighted to find a book - or you might attract someone who's never heard of BookCrossing before!