The Fire Chronicle: The Books of Beginning #2, John Stephens

It's been six months since Kate, Michael and Emma confronted the Dire Magnus, but the trail to their long-lost family remains cold. Then Michael and Emma find the man who was the last person to see them. He knows about a secret map of a distant, mysterious land - maybe this is the clue that will lead them to their parents...

Meanwhile, Kate's connection to the Book of Time grows ever stronger, and when a dangerous trick traps her in the past, she must find new friends to help her return home.

Once more the children must embark on a daring and perilous quest to find the second Book of Beginning and harness its power. But will it be enough to save them all?