A few years ago Prof Richard Wiseman and colleagues carried out a project to find some of the best 'ghost' photographs in the world. You can see the top 100 'ghost' photographs here. Meanwhile, here are five of the creepiest photographs from the collection. Sleep tight......

1) The ghost in the hair.


2) The ghost in the water


3) The ghost in the window


4) The ghost under the covers


5) The ghost at the wedding



"Wiseman shows us a higher joy as he skewers the paranormal charlatans, blows away the psychic fog and lets in the clear light of reason"
Richard Dawkins
"...a fabulously funny and enlightening dissection of paranormal claims"
PZ Myers
"...both scholarly and hilarious...this fast-paced book, packed with exercises to try for yourself, is a terrific read"
Susan Blackmore