Serving aboard the magnificent sky-ship Stormchaser, Twig is still trying to prove himself to his pirate father Cloud Wolf--with mixed results. As old plots and schemes unfold, Twig learns that his father was once known as Qunitinius Verginix, "the finest Knight Academic in a hundred generations," entrusted by the Professors of Light and Darkness to secure "stormphrax" (the sacred, super-heavy substance that keeps the city of Sanctaphrax from sailing skyward). Betrayal forced Twig's father into piracy, but the seeds sown by that misdeed have only now come to fruit, through a convoluted conspiracy of corruption. Now the Stormchaser must sail again--Twig, in tow, of course--chasing the Great Storm in search of stormphrax.
The pace only quickens in Stewart and Riddell's well-done, slightly scary series, and younger readers should be warned that these books don't pull too many punches. Fortunately the occasional violence is much like you'd find in Grimm's tales: brief and often just. Addicted American fans slavering for the next book in this British series will be glad to know they can look forward to many more installments. (Ages 9 to 12) --Paul Hughes