Of all Britain`s mystery beasts, the alien big cats are the most renowned. In recent years the notoriety of these uncatchable, out-of-place predators have eclipsed even the Loch Ness Monster. They slink from the shadows to terrorise a community, and then, as often as not, vanish like ghosts.

But now film, photographs, livestock kills, and paw prints show that we can no longer deny the existence of these once-legendary beasts.

Here then is a case-study, a true lost classic of Fortean research by one of the country's most respected researchers; Andy Roberts. Cat Flaps! is the product of many years of research and field work in the 1970s and 80s, an odyssey through the phantom felids of the North East of England.

Follow Andy on his flat cap safari as he trails such creatures as the 'Whitby lynx', the 'Harrogate panther', and the 'Durham puma'.

Written with humour, intelligence, and a healthy dose of scepticism, Cat Flaps! is a book that deserves a place on the bookshelf of every cryptozoologist.