There are 2 stories in this book. 1.The Big Sniff. When Abby sniffs she can smell things that aren't there - such as horses when the road is full of cars, which is very worrying. She decides to sniff very carefully, but one day she forgets and takes a huge sniff - and sees men on horseback charging towards her. Then something terrible happens. 2. The Last Quarryman. John wants to explore the tunnels where quarrymen like his great-grandfather used...