Seventh Son (1987) is an alternate history/fantasy novel by Orson Scott Card. It is the first book in Card's The Tales of Alvin Maker series and is about Alvin Miller, the Seventh son of a seventh son. Seventh Son won a Locus Award and was nominated for both the Hugo and World Fantasy Awards in 1988.

Seventh sons have strong "knacks" (specific magical abilities), and seventh sons of seventh sons are both extraordinarily rare and powerful. In fact, young Alvin appears to be the only one in the world. His abilities make him the target of The Unmaker, who recognizes Alvin's powers as those of a Maker - only the second ever, and it had been a long time since the first had walked on water and turned water to wine. The Unmaker works largely through water, trying to kill Alvin in his early years, before he can master his abilities.

Plot summary

Alvin's family is migrating west. When they try to cross the Hatrack River, an unknown force tries to stop the as-yet-unborn Alvin being born - since Alvin would be the seventh son of a seventh son, therefore possessing incredible powers as a Maker. The force sends a tree down the river to crush the wagon the pregnant Mrs. Miller is riding in. Her son Vigor diverts the tree, but is mortally wounded in the act. Because a seventh son must be born while the other six are alive, Vigor desperately clings to life until Alvin is born. Help is dispatched at the insistence of five-year-old "torch" (a person who, among other things, can see the life forces of people and under certain conditions, their myriad alternate futures) Peggy Guester, who sees Alvin and Alvin's possible future as a Maker.

As the years pass, Alvin avoids numerous attempts an unknown force to kill him, often helped by the intervention of a mysterious protector. Alvin's father, a non-believer in God, believes that a water spirit is trying to kill Alvin. When Alvin is seven, a new Reverend, named Thrower, arrives in town, trying to build a church. Alvin's father refuses to help, but Mrs. Miller has all of her sons work on building the church. When the ridgebeam is being place onto the church in construction, it shivers and breaks, seemingly about to fall on Alvin. However, mid-air, it breaks in two, and misses Alvin - yet another example of Alvin's close-to-death experiences. When Alvin goes home, he provokes one of his sisters by poking her, so they get revenge on Alvin by putting needles into his night gown. Alvin avenges himself by using his knack to send cockroaches after his sisters. The plan works, Alvin winning a victory over his sisters. However, afterwards, he has a vision he dubs Shining Man, who makes him promise only to use his knack for good.

When Alvin is ten, "Taleswapper" (William Blake) a traveling storyteller who arrives in the town Alvin's parents have founded. After stopping by Alvin's brother-in-law's house (who directs Taleswapper to the Miller house), he visits the church, where he notices that the altar has been touched upon by an evil entity. Reverend Thrower kicks him out, and Taleswapper goes to the Miller's, where his timely intervention stops Mr. Miller from killing Alvin. Taleswapper is welcomed in. Taleswapper helps to put a name to the unknown force that tries to stop Alvin from realizing his true powers as a Maker: the Unmaker. Meanwhile, the Reverend Philadelphia Thrower becomes a tool of the Unmaker - who was the evil force that touched the altar.

Soon the Miller family goes to a quarry to cut out a millstone. Here Alvin's knack is revealed - single-handedly he cut the millstone through hard rock. During the night, Taleswapper and Mr. Miller guard the millstone. Mr. Miller tells Taleswapper a story about how a force is trying to use him to kill Alvin - revealing the reason why Mr. Miller was about to kill Alvin when Taleswapper first arrived. Taleswapper advises Mr. Miller to send Alvin away to someplace where he may be safe. The next day the millstone is taken home. The Unmaker finally manages to injure Alvin, by making a millstone fall on him. Taleswapper encourages him to heal himself. Alvin does so, but finds that a part of his bone he cannot heal alone, and Alvin falls into a time of bad health. He realizes that he might need outside help to heal himself. Reverend Thrower (acting as a surgeon) attempts to kill him, but finds himself unable to by a mysterious force. Alvin heals himself (with the aid of his brother Measure, who performs the surgery). Alvin contracted as an apprentice to a blacksmith in the town on the Hatrack River where he was born.

Taleswapper meets up with Peggy. It is revealed that she, using her torch powers and Alvin's birth caul, had protected Alvin all his years, and the Unmaker was only able to hurt Alvin with the millstone because Alvin himself overrode her powers that tried to save him.

The book's sequel, second in the tales of Alvin's life, is Red Prophet.

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