Steve's Dreams: Steve and the Sabretooth Tiger by Dan Anthony
It's the summer holidays, but for nine-year-old Steve life in his home town is full of hidden menace. There was that trip to the dentist for a start - and that Thing in the crinkle-cut chips freezer compartment...Steve believes he must protect his family from a dangerous, unpredictable world. But he can't solve all the problems on his own. He's just not quite big enough. Then the mysterious Library of Dreams comes calling and things start to get weird. Steve finds himself an unlikely hero on an impossible mission to outwit flesh-eaters and sabretooth tigers and save the human race.