This manga was released straight to tankobon (graphic novel) format, therefore there was no serialization. However, a thirty page preview ran in Akita Shoten's Young Champion Magazine. The problem with straight to tankobon manga is that there is no indication whatsoever of when the next volume might be released.
Though the author is the same, the artist has changed from the original manga. The realistic grit of Masayuki Taguchi has been replaced by the lighthearted cartooniness of Hitoshi Tomizawa. Also, though it is still written by Koushun Takami, the original story is based on the universe of the films rather than that of the original novel.

Under the guise of a "study trip," a group of students from Shiroiwa Junior High School in the fictional town of Shiroiwa (Kagawa Prefecture) are gassed on a bus. They awaken in the Okishima Island School on Okishima, an isolated, evacuated island. They learn that they have been placed in an event called the Program.

According to the rules, every year since 1947, 42 third-year high school students are isolated, and each student is required to fight to the death until one student remains. Their movements are tracked by metal collars around their necks, which contain tracking and listening devices; if any student should attempt to escape the Program, or enter declared forbidden zones, a bomb will be detonated in the collar, killing the wearer. If no one dies in a 24 hour time period, there will be no winner and all collars will be detonated simultaneously.

(Source: Wikipedia)