The Necromancer is the fourth book of the series The Secrets of the Immortal Nicholas Flamel written by Irish author Michael Scott. The novel was released in the USA on May 25, 2010, published by Delacorte Press, which is an imprint of Random House. It was released in the UK on August 5, 2010 when it appeared (along with the three prior titles in the series) with a different cover. The Necromancer entered The New York Times Best Seller List (Children's) at #3 on its first week of release. The audio book version (released at the same time in the USA) is read by Paul Boehmer.
Nicholas Flamel, Sophie, and Josh return to San Francisco. The Flamels go to their book store while Josh and Sophie head for their Aunt Agnes' house. When they approach they see a limousine waiting outside and a stranger talking to their Aunt. They approach with caution but in the following scuffle on the doorstep Sophie is dragged into the car by a female looking exactly like their lost friend Scathach, but who is in fact her twin, Aoife. Josh races to the book store to alert Nicholas and Perry and together, they set out to rescue Sophie who has been taken to a houseboat in Sausalito owned by Aoife's companion, the Japanese immortal, Niten.
Dr. Dee has been declared utlaga (a wanted man) for his failure to capture the missing pages of the Codex by his Dark Elder masters. Not wanting to experience their wrath, he flees. He makes his way across England from Salisbury Plain to his London office with the last two legendary swords, now fused together, in his possession. Once in London he enlists the help of an old acquaintance, Virginia Dare, and after an encounter with some cucubuth bounty hunters the pair escape to Dee's home in San Francisco, where he prepares to call back the Archon Coatlicue -Mother of the Gods- to help him with his plans to conquer planet Earth and take revenge on The Dark Elders that outlawed him.
Joan of Arc and Scathach are joined in their exile by William Shakespeare, Palamedes and the Comte de Saint-Germain after they seek out Lord Tammuz's help. Shortly after they are re-united they are joined by the mysterious, hooded, hook-handed man who tells them that he has a pre-destined mission for them. He takes them through Xibalba and several other shadow realms to the Earth ten thousands over years ago, when Danu Talis still existed and they have to fight in the battle that meant its downfall.
Niccolò Machiavelli and Billy the Kid get off the monster filled Alcatraz Island with the help of Billy's Dark Elder Master who sends the immortal Black Hawk to retrieve them and bring them both back to his house. After a fraught meeting with Billy's master they count themselves lucky to be alive as they had failed to accomplish the missions given to them by their masters: to kill Perenelle and loose the monsters trapped on the island onto San Francisco. The pair set out to return to Alcatraz and make amends by achieving what they were tasked with doing.
After their initially tense meeting, Aoife, Niten, Josh, Sophie, Nicholas, and Perenelle agree to travel to Point Reyes so that Josh can be taught the magic of fire by Prometheus, the Master of Fire. Josh is separated from the others shortly after learning the magic of fire and finds himself walking into Dee's home, Sophie wakes up and realizes that Josh is missing. After alerting the others about his disappearance they track Josh to Dee's home. Sophie, Aoife and Niten race to stop him from unwittingly helping Dee complete his plan to summon the fearsome Coatlicue who Dee plans to turn loose on the Dark Elders, while Nicolas and Perenelle stay with Prometheus, following what they do. Josh, still under enchantment, turns against his sister and escapes with Dr. Dee and Virginia Dare, while Aoife pushes Coatlicue back into the shadowrealm it came from, but leaving herself trapped with it. This leaves the end of the book on a cliff hanger. The Flamels are very weak, the twins are divided, and the Dark Elders are gathering in anticipation of the Final Summoning at Litha, when they hope to return to power and dominate the world.
* Aoife - Scathach's twin sister.
* Niten - An immortal Japanese swordsman.
* Coatlicue - Mother of All, a fiendish Archon.
* Quetzalcoatl - The Feathered Serpent, Billy's master.
* Prometheus - Master of Fire. Trains Josh in the Magic of Fire and Aoife's and Scathach's uncle.
* Lord Tammuz - The Green Man and Palamedes' master.
* Virginia Dare - Immortal, dangerous human; joins Dee, owns a flute with the power to render animals and humani unconscious .
* Black Hawk - Immortal Native American who assists Billy the Kid.
* Marethyu - The hook-handed man who translated the Codex. Marethyu means "Death" in the ancient language that was spoken on Danu Talis. Created a Pleistocene Shadowrealm.
The book's title, The Necromancer, refers to Josh Newman. Michael Scott would not name the Necromancer online until the book had been released around the world, merely saying that "The Necromancer is not Dr Dee."  He later stated: "So clearly, Dee "makes" Josh a Necromancer..." 
On August 5, 2010 in the UK The Necromancer was released featuring a new style cover.
The Necromancer is also available as an unabridged audiobook, narrated by Paul Boehmer. It was released by the Listening Library on May 25, 2010 in the USA and on August 5, 2010 in the UK. 
For The Necromancer release a new game was launched on May 5, 2010. It was called The Quest for the Codex. Players were presented with a map, divided up into a grid, they were then allowed 10 clicks per day to find hidden rewards, playing pieces and to unlock 3 mini-games. Players were awarded a key for each mini-game that they completed. When they completed all 3 mini-games and had all 3 keys they received online access to the first 6 chapters of The Necromancer.
On November 19, 2009 it was announced in Variety Magazine that Lorenzo di Bonaventura had bought the film rights to the series. Michael Scott and Barry Krost will be the executive producers. The script writer has yet to be announced. Imdb now lists The Alchemyst film as "in production"
The Warlock was released on May 24, 2011.
In order of release:
* The Alchemyst
* The Magician
* The Sorceress
* The Necromancer
* The Warlock
* The Enchantress (Will be released 22 May, 2012)