A boy and his black Labrador are sent by an "angel" to forever roam the earth looking for those in need of help of some sort. 5th-grade reading level.

"...even as his dream raced on, over centuries, across seas, over mountains, through distant lands, wherever he and Ned had been sent to assist the oppressed in their struggle against villainy. He saw faces from the past, friends and enemies alike, felt the apprehension of arrival, the joy of being part of so many communities and the sorrow of having to depart and leave them behind. Always onward to fresh adventures, with his faithful, enchanging friend Ned."

When the Flying Dutchman is cursed, a pure-hearted boy and his dog are also touched by the angel: they gain eternal youth and telepathic communication and are told to go out into the world and do good. 300 years later, they turn up in a village in England which they have to save from being turned into a limestone quarry.

This is Brian Jacques' first book outside the Redwall series and it was okay. Nothing more or less, I'm afraid. It was a standard kids-save-the-day book but with a talking dog (although only his master can hear him). You also get the impression that it's a setup book for a series, since the format is certainly there for it (in a Quantum Leap/Littlest Hobo sort of way).