"All right," David agreed, "but we don't know how to get out and it is time. His voice died away in a gasp of surprise and fear as he grabbed Jon's arm and swung him round so that he was facing the wall at the end of the room . . . Suddenly a vertical line of orange light appeared on the wall behind the bookshelves . . . slowly the secret door opened and in the gap a man's hand appeared!

David Morton and the twins Dickie and Mary are living in London and two other members of the Lone Pine Club (Jon and Penny Warrender) have come to stay with them. And never had so much occurred to them in so short a time. There was a mysterious little man Jon saw at the football match. The stranger seemed anxious not to be recognised, yet Jon had a funny feeling he has seen him somewhere before. And James Wilson, the Lone Piners journalist friend, is following up a sensational story about some fashionable art prints which seem so valuable but which he suspects are clever fakes. Then Harriet Sparrow, soon to become a member of the Club, follows the strange little man to a lair in a rooftop penthouse, but cannot find the place again. And when Jon and David do track it down, they are spotted by the gang, dragged inside and left to face the sinister master forger on the other side of that secret door, and amazingly the forger turns out to be another very nasty "someone" they have met before .

This is another exciting and complete story in Malcolm Saville's deservedly popular Lone Pine Adventure series, re-edited to delight a new generation of young readers.

ISBN: 0 86391 083 1
202pp Hardback
Our RRP £7.25