The Legend of Korra (1. sezon)

Kitap 1: Hava, Michael Dante DiMartino ve Bryan Konietzko tarafından oluşturulan The Legend of Korra çizgi dizisinin ilk sezonu. On iki bölümden oluşan sezon, ilk başta tek başına bir mini dizi olarak tasarlanmıştı; ancak daha sonra toplamda dört sezon ve elli iki bölüm olacak şekilde uzatıldı. Kitap 1: Hava sezonu ABD'de Nickelodeon kanalında 14 Nisan'dan 23 Haziran 2012'e kadar yayınlandı ve diğer ülkelerde de Haziran 2012'de yayınlanmaya başlandı.

Sezon, önceki Avatar: Son Havabükücü dizisinden Avatar Aang'in halefi olan, Güney Su Kabilesi'den on yedi yaşındaki Korra'nın hikâyesini anlatıyor; hava bükücülüğü öğrenmek için başkent Cumhuriyet Şehri'ne gider ve burada maskeli Amon tarafından yönetilen "Eşitçiler" adında bükücü karşıtı bir devrimci grupla karşı karşıya kalır.

Dizi televizyonda ilk gösterimini yapmadan önce, it was announced that the first two episodes would be pre-released online if "Korra Nation", an online social-networking platform for the show, reached 100,000 likes and shares. The goal was reached and at midnight on March 24, the first two episodes were released on a Viacom-owned website. They remained online for the duration of the weekend.

Book One: Air aired on Nickelodeon and Nickelodeon HD between April 14, 2012 and June 23, 2012. For U.S. residents, the episodes were available for free viewing on the channel's website and for purchase through digital download services. Nicktoons re-aired Book One, with a few minutes of commentary from the series's creators during commercial breaks, from July 9 to July 20, 2012 under the name Korra: Making of a Legend.

This series debuted in Canada on channel YTV on June 9, 2012 and on Nickelodeon Canada in late 2012. The series also premiered on Nickelodeon UK and Ireland on July 7, 2013.

The series opens introducing Korra as the Avatar and showing that she has mastered all elemental arts except airbending. Korra runs away to Republic City so that Tenzin, Avatar Aang's youngest son, can train her therein. In the metropolis, Korra clashes with police chief Lin Beifong (the daughter of Toph Beifong of the original series) after dispensing vigilante justice to the local triads. Tarrlok, an ambitious member of the city's ruling council, enlists Korra against the "Equalists", an anti-bender revolution led by the masked Amon. As Korra explores Republic City, she befriends the brothers Mako and Bolin and joins their pro-bending team, the "Fire Ferrets". The team is sponsored by Asami Sato, daughter of a wealthy industrialist, and the four together form the new "Team Avatar".

After Korra's appearance in the city, the Equalists become increasingly violent, climaxing in an attack on the pro-bending arena. When Tarrlok indiscriminately represses non-benders, Korra refuses to support him. In the resulting fight, Tarrlok overpowers Korra with bloodbending, an illegal form of waterbending, and kidnaps her, framing the Equalists. As Amon arrives at Tarrlok's hideout and removes Tarrlok's bending, Korra escapes, only to find Republic City facing an Equalist conquest.

In the two-part finale, naval reinforcements led by Iroh (the grandson of Zuko of the original series), are defeated by Equalist sea mines and biplanes. Attempting to find Amon, Korra learns that Tarrlok and Amon are the sons of Yakone, a mob boss defeated 42 years ago by Avatar Aang. Amon strips Korra of her bending abilities; but Korra reveals her dormant airbending abilities in a moment of distress, and exposes Amon as a waterbender, causing all his followers to desert him. He flees with Tarrlok, who detonates their boat on the open sea. Despondent, Korra establishes spiritual contact with her predecessor Aang, who restores her bending powers, allowing her to do the same to Amon's other victims.

Elements of the first season that received praise were the exceptional quality of the animation, the background paintings and the martial-arts action scenes, as well as the series' innovative and engrossing visual design and style. The writers were credited for finding a believable balance between magic and technology and for their mature and nuanced portrayal of romantic relationships and conflicts. Critics also praised the writers' willingness and ability to tackle difficult themes such as social unrest, terrorism, Tarrlok's murder–suicide of Amon, as well as the insinuation of Korra contemplating suicide during the season finale.

While Book One: Air was generally well received, some aspects of the writing were criticized by reviewers. In Kotaku, Kirk Hamilton wrote that he felt that the series failed to tackle its central conflicts in a meaningful way, commenting also on the mix of comedy and drama, the many character arcs in a shorter series than Avatar, and the neat ending. Raz Greenberg of Strange Horizons commented that Korra seemed as though she had things too easy in life in comparison to Aang, and also criticized the show's rapid pacing. Max Nicholson of IGN praised the series' writing, animation, humor, setting, and characters, and wrote that elements characterized as a deus ex machina had been foreshadowed throughout. But in his opinion, the love triangle arc between Mako, Asami, and Korra fell flat and the pro-bending arc felt superfluous, although it led up to the conflict with Amon. He also considered that Mako, although a major character, felt underwritten. Lauren Davis of io9, while approving of the character arcs and the setting, was also disappointed about the series' pacing.

The initial airings of Book One: Air, excluding reruns and digital downloads, drew an average of 3.7 million Seyirci per episode.