Groosham Grange is a 1988 children's fantasy book by best-selling British author Anthony Horowitz. It received the French Prix Européen du Roman Pour Enfants ("European Award for Children's Fiction") in 1993. Horowitz intended Groosham Grange as the basis for a series, but so far he has written only two books, the second being The Unholy Grail (1999), retitled in 2003 as Return to Groosham Grange. The books deal with serious emotional issues, but they are also light-hearted, imaginative, and often funny at times. They are appropriate for young readers, and advanced readers. The story explores the legend of "the seventh son of a seventh son", and what it has to do with witchcraft.
The famous Harry Potter series has many similarities with this novel, including moving portraits and an unsuspicious teacher stealing a magically protected item in the school, among other similarities. The Harry Potter series came about long after the Groosham Grange books, with the latter coming out in 1995 and the former appearing in 1997.
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