Esplin 9466 Lesser
Biographical information



Joe Bob Fenestre




Esplin 9466 (brother)


Owner of Web Access America



Behind the scenes
First appearance

The Hork-Bajir Chronicles

Last appearance

The Warning

Esplin 9466 Lesser was a Yeerk. The double six at the end of his name signifies that he was formed from the same grub as another Yeerk, half of a pair of twins. His brother was Esplin 9466, better known as Visser Three.


When a pair of Yeerk twins are born, it is usual for one twin to become a success and gain power and influence, while the other - designated "Lesser" - is left with nothing. While it is possible for twins to share power, this very rarely happens. In this case, one Esplin 9466 twin became the powerful Visser Three, while the other, despite serving alongside his brother in the Hork-Bajir Invasion[1], was left to an unimportant position during the Yeerk Invasion of Earth, infesting a lowly computer programmer named Joe Bob Fenestre.

Esplin 9466 Lesser decided to turn his misfortune around. Using Fenestre's knowledge of human businesses, and his own knowledge of advanced computer systems, he created Web Access America, which quickly became the world's leading Internet Service Provider. The success of the company made Fenestre a billionaire and household name, and gave Esplin a vast information network - not only the names and addresses of WAA's subscribers, but more personal information gleaned from e-mails and chat rooms. Esplin quickly gains influence in human society, making him an asset to the Yeerk invasion.

However, Visser Three, fearing his brother's rising popularity and ambition, declared him a traitor, forcing him into hiding. Fenestre built a huge mansion and guarded it heavily. Knowing that his twin's host had the ability to morph into animals of all sorts, he equipped his mansion with weapons, ranging from Rottweliers and guards with submachine guns to insecticides and electrical force fields. His guards had instructions to shoot anything that attempted to come close to the house.

The Animorphs became suspicious of Joe Bob Fenestre when they infiltrated the Web Access America offices, looking for the names and addresses of users in a chat room whom they believed were in danger of Yeerk infestation. They discovered that Fenestre had been a participant in the same chat room, with the username "Fitey777", and decided to investigate Fenestre's mansion.

Although the mansion's security was difficult to break through, they were eventually able to gain access and meet with Fenestre - and Esplin. Esplin explained to the Animorphs that the only reason that he was still alive was due to a technique he had discovered that let him substitute a powder made from the bodies of Yeerks for Kandrona rays, sustaining his life without needing to visit the Yeerk pool, but forcing him to become a cannibal. He presumed that Visser Three allowed him to live only because he desired Esplin's technique; but, as he explains, the technique would never catch on in Yeerk society.

After Esplin had told his story, Cassie, horrified by his cold-blooded attitude towards humans and Yeerks, demanded that Jake kill Esplin. Jake, however, had already agreed not to harm him, but as a compromise, adds a condition: Esplin may never leave his mansion again. Esplin agrees; however, a few days afterwards, Fenestre's house burns down under mysterious circumstances. It is implied, but never stated, that Jake or Cassie may have done this. Nobody died in the fire, but Esplin's fate was never discovered.[2]


  1. The Hork-Bajir Chronicles
  2. The Warning

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