The summer holidays are dragging on and Harry Potter can't wait for the start of the school year. It is his fourth year at Hogwarts School of Witchcraft and Wizardry and there are spells to be learnt and (unluckily) Potions and Divination lessons to be attended. But Harry can't know that the atmosphere is darkening around him.

The fifth title in the worldwide bestselling series

When a new NASA satellite detects evidence of an astonishingly rare object buried deep in the Arctic ice, the floundering space agency proclaims a much-needed victory?a victory that has profound implications for U.S. space policy and the impending presidential election.

The NSA's invincible code breaking machine encounters a code that it cannot break. The agency calls in its head cryptographer Susan Fletcher, a brilliant and beautiful mathematician. What she uncovers sends shock waves through the corridors of power.

Summoning up more than 20 years of Japan's most dramatic history, the geisha's story uncovers a hidden world of eroticism and enchantment, exploitation and degradation. It moves from a small fishing village in 1929 to the glamorous and decadent Kyoto of the 30s and on to postwar New York.

The Curious Incident of the Dog in the Night-Time is a murder mystery novel like no other. The detective, and narrator, is Christopher Boone. Christopher is fifteen and has Asperger's, a form of autism. He knows a very great deal about maths and very little about human beings. He loves lists, patterns and the truth. He hates the colours yellow and brown and being touched. He has never gone ...