Original: Anyone who wishes to officially participate in '' releasing '' books , whether leaving it in a public place or passing it on to a friend , must register on the BookCrossing.com website , although there is the option to remain anonymous when '' catching '' or recording the find of a book .
Simplified: Anyone who wishes to '' release '' books , whether leaving it in a public place or passing it on to a friend , must register on the BookCrossing.com website , although there is the option to remain hidden when '' catching '' the find of a book .