The Standard Book of Spells - Grade 1
The Standard Book of Spells, Grade 1 was the first book in The Standard Book of Spells series, written by Miranda Goshawk. It was a required textbook for first year students at Hogwarts School of Witchcraft and Wizardry Charms differ from Transfiguring Spells in the following manner: a charm adds certain properties to an object or creature, whereas a transfiguring spell will change it into something utterly different. The lesser charms are not very difficult to break and many of those that you learn as a young wizard will wear off in a matter of days or even hours. Dark charms are known as jinxes, hexes and curses. This book does not deal with such spells. Lapses in concentration while charming can result in painful side effects – remember Wizard Baruffio, who said ‘s’ instead of ‘f’ and found himself lying on the floor with a buffalo on his chest. Some charms will be ineffective on large creatures such as trolls, whose hides repel all but the more powerful spells.
The Unlocking Charm, also known as the Thief's Friend (Alohomora) is a charm that unlocks and opens doors and windows that are not protected by magic. It is also able to open doors locked by the Locking Spell (Colloportus).
Although it is unknown who invented it (the spell was created in Africa) it was brought to Britain and hence to the world in the 17th century by Eldon Elsrickle. He used it to terrorise London, stealing from homes of Muggles and wizards alike, until Blagdon Blay invented the Anti-Alohomora Charm.