BBC presenter Jeremy Vine gave away hundreds of books to members of the public at Waterloo station on Wednesday to mark World Book Day.
The event was filmed for his new BBC One daytime book club show, Page Turners.
The books were tagged with a Bookcrossing registration so their journey can be recorded and followed online.
Bookcrossing has become a phenomenon across the world. It involves leaving a book in a public place in order for it to picked up and read by others who then do likewise.
With commuters travelling from Waterloo Station to destinations across the UK and Europe, the books are set to scatter far and wide.
Page Turners transmits on BBC One from April 2005.
All of the giveaway books are on the short list of titles set to feature in Page Turners.