Books with title The mysterious mannequin

It was only supposed to be a mountain wilderness hike for three boys with camping gear, guides, and everything. What could possibly go wrong with all those adults around? These three friends plodded along at the back of the line of hikers. Then one of the boys did something he knew was wrong; he darted off the trail to get a picture. They’d taken special classes, joined an expert group of mountain hikers, and now they found themselves separated from the group, all alone, and lost in the fog. But that’s not the worst of it. The boys had to cross a broken-down suspension bridge high above a bottomless gorge with raging water gushing right through the middle of it. There was a bear that nearly ate Benji, hundreds of soldiers on a military training exercise, and an abandoned cabin – which wasn’t abandoned after all. A band of terrorists were in the final stages of carrying out their deadly attack. Could the boys get away? Could they tell someone about the evil plan? And would anyone be able to warn the city of Denver in time?

So far, it had been a typical New Year's Eve house party. But Mr Satterthwaite -- a keen observer of human nature -- sensed that the real drama of the evening was yet to unfold. So it proved when a mysterious stranger arrived after midnight. Who was this Mr Quin? And why did his presence have such a pronounced effect on Eleanor Portal, the woman with the dyed-black hair?

A conjurer of skill with an instinct for detection, Mr. Harley Quin has an almost magical flair for appearing at the scene of the most remarkable crimes. But is it just a trick of light that haunts his shadow with a ghostly apparition? Is it fate that invites him to a New Year's murder? And what forces are at work when his car breaks down outside Royalston Hall, an isolated estate with a deadly history?