Title: Galax-Arena
Content:  Galax-Arena, by Gillian Rubinstein, is a 1995 science fiction novel following 3 children who are kidnapped by aliens. It deals with issues of slavery, what we know versus what we believe to be true, the difference between children and adults, street people (children), and spirituality, to an extent. A sequel, Terra-Farma, was also published. It continues the story of Joella and her siblings after they leave Galax-Arena, and follows their further brushes with Project Genesis Five, the organization who created the Galax-Arena. There was going to be a third novel called Universercus that would conclude the trilogy, but it was never published.
Title: Galaxion
Content:  Galaxion is a science fiction comic book and webcomic series written and drawn by Canadian Tara Tallan (née Jenkins). The story follows the crew of an interstellar ship, the Galaxion, as they test a new experimental hyperdrive engine. The story's narrative presents the Galaxion's geologist Aria Schafer's point of view.
Title: Galaxian
Content:  Galaxian (ギャラクシアン) is a 1979 fixed shooter arcade game developed and published by Namco. It was licensed and distributed by Midway Manufacturing in North America. The player assumes control of the Galaxip starfighter in its mission to protect Earth from waves of aliens. Gameplay involves destroying each formation of aliens, who dive down towards the player in an attempt to hit them. Designed by company engineer Kazunori Sawano, Galaxian was Namco's answer to Space Invaders, a similar space shooter released the previous year by rival developer Taito. Space Invaders was a sensation in Japan, and Namco wanted a game that could 
Title: Galax-Arena
Content:  After their mother leaves and their father loses his mind, Joella, Peter, and Liane are traveling to their Aunt Jill when a stranger named Hythe entices, drugs, and kidnaps the trio. He takes them to a remote place and launches them into space, where they are forced to become performers for aliens known as Vexa in Galax-Arena, on the planet Vexak. The Galax-Arena itself is a stadium-type place where human children perform death-defying stunts of gymnastics for a crowd. There are no safety nets, in fact death is sometimes encouraged by their trainer Hythe. As they perform, the Vexa are connected to devices that allow them to 
Title: Galaxian 2
Content:  Jaro Gielens, author of the book Electronic Plastic, described the game as an "Excellent 2-player space shooter, with very special case design".
Title: Galax-Arena
Content:  Earth, but refuse to believe it when faced with the evidence. As a pet, Joella manages to expose the Vexa who she has become the pet of, as an elderly woman, Emmeline. Emmeline reveals to Joella and Mariam that Galax-Arena is part of a massive experiment called ‘Genesis 5’ to give the extremely rich clientele of Genesis 5 like Emmeline immortality by channeling the Peb’s adrenalin into the old people’s bodies to trick the body into thinking it is young and not close to death. Problematic children are killed. Seven of the Peb manage to escape Galax-Arena, though only because they believe that there is hope.
Title: Galaxian
Content:  Galaxian is a space shoot 'em up video game. The player controls a starship called the "Galaxip", the objective being to clear each round of aliens. The enemies appear in formation towards the top of the screen, with two escort ships, labeled the "Galaxian Flagship" or "Galboss". Enemies will make a divebomb towards the bottom of the screen while shooting projectiles in an attempt to hit the player. The Galaxip can only fire a single shot on-screen, and must wait for it to hit the top before being able to fire another, due to limitations of the hardware. Flagships will make a divebomb with two red escort ships - shooting all three of these will award the player bonus points, with extra points awarded to the destruction of the flagship. Enemy movement will increase as the game progresses alongside the number of shots that the enemies fire. Rounds are indicated by small flags at the bottom of the screen. The game's attract mode featured a slim scenario, reading "WE ARE THE GALAXIANS. MISSION: DESTROY ALIENS".
Title: Galaxian 2
Content:  Galaxian 2 (also written as Galaxian II ) is a handheld electronic game that was released in 1981 in the US by Entex Industries. It was also released the same year in Japan under the name Astro Galaxy and in Europe under the name Astro Invader. The game was also released under the Futuretronics brand in Australia. The game is called Galaxian 2 because it has a two-player mode. It is not a sequel; there is no Entex Galaxian.
Title: Galaxian
Content:  Atari, Inc. published ports of Galaxian for its own systems&mdash;Atari 8-bit family, Atari 2600, Atari 5200&mdash; in 1982–3, three or more years after Galaxian appeared in arcades and a year or more after Galaga. Additional ports were published under the Atarisoft label: Apple II, ColecoVision, Commodore 64, VIC-20, IBM PC, and ZX Spectrum. Ports from other companies were sold for MSX (Europe and Japan only), NEC PC-8801, Famicom (Japan only) and Sharp X1. A Bally Astrocade version was published as Galaxian, but the name was later changed to Galactic Invasion. Coleco released a stand-alone Mini-Arcade tabletop version of Galaxian in 1981, which, along with Pac-Man, Donkey Kong, and Frogger, sold three million units combined. Entex released a handheld electronic game called Galaxian 2 in 1981. The game is called Galaxian 2 because it has a two-player mode. It is not a sequel, as there is no Entex Galaxian.
Title: Galaxian (album)
Content:  Galaxian is the fifth album by Keyboardist Jeff Lorber as leader of his band "The Jeff Lorber Fusion". Released in 1981, this was Lorber's last album as leader of his band "The Jeff Lorber Fusion" until 2010's Now Is The Time.

Question: Who is the author of Galax-Arena?
Answer: Gillian Rubinstein.