Book launched on the underground

An author is challenging commuters to find him as he distributes copies of his first book on the London Underground network.

From 7am on Wednesday 1 September, Peter Inson, a retired headteacher will leave copies of his book "Dunno" on his journey where he will change trains every six minutes. He will have up to 100 books and anyone who challenges him will receive a signed free copy.

He got the idea from the newspapers left on trains and read by other commuters.