Captain's Fury is a 2007 high fantasy novel by Jim Butcher. It is book four of the Codex Alera. It takes place approximately two years after the events in book three, Cursor's Fury.
Two years have passed after the Night of the Red Stars and the Battle at the Elinarch (in book three of the Codex Alera, Cursor's Fury). Rufus Scipio/Tavi had been repelling attacks from the Canim forces for two years and the war against Kalare raged on. Senator Arnos who is in charge of the war committee is pushing for the destruction of all of the Canim forces in Alera. Isana is faced with telling Tavi of who his father is and confronting her own abilities. Tavi must find a way to end the conflict between the Canim and Alera or it may mean the destruction of all of his forces. Gaius Sextus, and the Count and Countess of Calderon take on a secret mission to stop Kalare.
Senator Arnos comes to the Elinarch to take over command of the battle against the Canim. Senator Arnos is working with Invidia Aquitaine to remove Tavi as leader of the battle and eliminate him entirely. Arnos is accompanied by several singulares who are a constant threat to Tavi and who attempt to eliminate him through the book.
Isana, after several attempts of trying to tell Tavi that she is his mother and that his father was Gaius Septimus, was unable to do so. Araris delivers the message instead.
Tavi has a meeting with the Canim leader, Nasaug, where he tells Nasaug that he knows that the Canim are trying to build ships to get them back to their homeland. He strikes a deal with Nasaug that he would help them but Nasaug says the only way that a deal can be struck is if Tavi returns Ambassador Varg to them. Arnos spies on this meeting and through the plotting of Arnos, Invidia and Marcus/Fidelias Tavi is removed from his command as Captain for conspiring with the enemy. Prior to leaving Tavi places Crassus in charge of the Alerian forces.
Tavi escapes from the prison and with Isana, Kitai, Ehren, and Araris they board a ship to take them to Aleria Imperia. During that voyage they are attacked by Arnos’ singulares and the group uses furycrafting to board the enemy ship and kill the witchmen that are hiding their presence from the leviathans. The enemy ship is destroyed by leviathans but Arnos’ singulares escape. During this battle, Isana’s powers grow and she is able to heal Araris who was seriously injured without a bathtub which is only performed by the most powerful healers and high lords and ladies.
Gaius takes Amara and Bernard into Kalarus’s lands as he tells them that Kalarus has woken one of the Great Furies in the Kalare mountains and if Kalare is killed the mountain will erupt and kill everyone in the region, Gaius intends to disarm the Fury. During their journey Gaius cannot use his powers as this will signal Kalare that he is on Kalare’s lands and ruin their mission. Gaius gets an infection as his feet blister from walking 300 miles to the mountain and he must be tended to along the way. As they approach the mountains the group is discovered by a legion of Immortals led by Brencis Minoris, Kalarus’s son. Gaius heals himself and destroys the legion. He then releases the great fury which destroys Kalare and all who reside in the area. Amara, who is angry at the First lord for lying to her, throws her silver coin in his face and leaves him.
At the same time Tavi is able to free Varg from the Grey Tower and returns him to the Canim forces. He then announces his identity as Gaius Octavian and challenges Arnos to a Juris Macto. Pharygiar Navaris, who is the deadliest cutter/sword in all of Alera, represents Arnos in the duel. Marcus (Fidelias) is instructed by Invidia to kill both Arnos and Tavi after the duel, using a balest, to make it look like a Canim attack. Marcus aims the balest and is able to strike both Arnos, as he tries to escape after Tavi wins the duel, and Invidia who Arnos grabs for protection. Invidia survives the initial injury but has the poison of the garlic oil in her system.
Tavi is able to strike a deal with Gaius Sextus allowing the Canim to return home and to send a cohort with them to ensure their safe passage and assist them in destroying the Vord that have taken over their lands. In the end it is also revealed that Tavi is now able to furycraft.
Marcus/Fidelias: Fidelias is torn throughout the book as to where his loyalties lie as he sees that Tavi is a chance at change and hope for Alera. He chooses to side with Tavi against Invidia and Arnos and kills them.
Amara: Amara who has to this point been very loyal to the crown loses faith in Gaius as he lies to her about the motives of the mission to Kalare
Isana: Isana’s confidence in herself grows as do her powers. She is able to throw a shark onto the deck of the enemy ship while battling in the Leviathan’s run. She creates a bridge of water which is turned into ice to help Tavi and his team escape the Grey Tower. She heals people with the skill and speed of a high lady. She proclaims her love for Araris.
Tavi/Gaius Octavian: Tavi learns his heritage and deals with the emotions of anger towards Isana for keeping this from him and loss of not having known his father. He reconciles with Isana and realizes she did what she had to do keep him safe.http://thebestreviews.com/review37817
Captain's Fury at Goodreads
The first four chapters can be found on the author's official site.