Description: Jonah and Archan race to the very top of Stone's mighty wall for the final confrontation. A thousand worlds must be crossed before the summit is reached ... and in this race there is no second prize.
Newest passengers on the Bark's greatest voyage yet are the mysterious Tom Coyote, flung to Stone from the erupting Mount St Helens in 1980 and, more mysterious still, the diminutive Mister Ren, who claims to have created immortality. In the glare of its guardian sun the fate of Stone - and all the worlds on which it depends - hangs by a thread.
Jonah must reach deep into the strands of memory to turn the flow of time's river to his advantage. But tinkering with history, as he has already discovered, is a dangerous game ...