airplane crash survival

When a mysterious message in the sand drives one of the castaways nearly insane, Hikari searches for a way to make things better, but the arrival of Hades could mean disaster for the surviving classmates.

"Sengoku and his remaining classmates, teachers, and allies have reached the island's last tower to finally uncover the secrets that could help them escape-- or seal their fate. But what they find inside may be more eerie than the strange beasts and dangers that have come before. Sengoku encounters unsettling and oddly prophetic information concerning his cohorts, revealing answers as well as more questions. Was there a diabolical purpose behind the 'accident' that led them to the island, and what part were they supposed to play in 'Project Eden'?"--Back cover.

"After learning that the island they're on may be near Okinawa, Sengoku and his friends put a plan in motion to sail back to Japan. But before they can do that, a decision is made to check out the fourth and final tower on the island. Their journey into the depths of the mysterious structure is sure to result in many discoveries, but when they least expect it, they may also find that they're not the only ones in the building"--Back cover.

As Akira and his fellow survivors struggle to evade the dangerous animals on the island, they discover that they have a human killer in their midst as well, one that seems to have it in for Akira.

"Yarai is determined to do whatever it takes to save the live of his dear teacher, even if it means taking the life of his friend. But can Yarai actually go through with it? With Yarai and Sengoku facing each other in battle to the death, it seems like Mami's dreaded vision is actually coming true. However, they may have a bigger problem on their hands, as it appears that the work of uncovering the traps surrounding the mysterious tower may have awoken a new and fearsome beast from its deep slumber"--Back cover.

"Kokono?'s plan comes to fruition, allowing him and Ohmori to evade execution while also creating a diversion for Sengoku and his friends to escape the clutches of Nishikiori. As they make their way back to the others, Yarai reaches Nishikiori's camp where he comes to face the cold, hard truth about Kurusu-sensei's condition. But seeing a chance to turn things in his favor, Nishikiori makes a deal with Yarai. Will Yarai go through with Nishikiori's dastardly request for the chance to save the life of his teacher?"--Back cover.

Evading various pitfalls, Sengoku and crew reach the deepest levels of the pyramid, where they make a discovery that brings them closer to understanding the mysterious island on which they are stranded. Meanwhile, Kokono? and Ohmori plot an escape from execution.

When a plan to infiltrate the mad doctor Nishikiori's camp backfires, Sengoku and his crew are sent deep inside the mysterious pyramid, where they make new discoveries, encountering more questions than answers about the strange island they are on.

Yarai and friends investigate a lighthouse, finding a corpse with a key in its mouth, and encounter two dangerous men.

Three different kinds of extinct creatures are after the school kids and it is up to Akira to figure out their weaknesses.