Stromchaser, Paul Stewart & Chris Riddell, Random House c1999, 0-385-75071-4

This is the second book in the Edge Chronicles. We find Twig, now sixteen years old, on his father's sky ship. His mission is to collect stromphrax, a substance needed to save the city of Sanctaphrax from floating over the edge. Once again Twig is involved with many creatures and adventures along his mission. The illustrations of Chris Riddell bring life to this second book also.