Here are the books as follows:
Eoin McNamee - The Frost Child(Book 3 of The Navigator Trilogy) - Published By Wendy Lamb Books - U.S
Every hundred years, four kids from four cities must save the world.
A mix-up with their reservations forces Harvey from New York, Mistral from Paris, and Sheng from Shanghai to share a room with the hotel owner’s daughter, Elettra. The four kids discover an amazing coincidence—they all have birthdays on February 29, Leap Day. That night, a strange man gives them a briefcase and asks them to take care of it until he returns. Soon afterward, the man is murdered.
The kids open the briefcase. In it they find a series of clues that take them all over Rome, through dusty libraries and dark catacombs, in search of the elusive Ring of Fire, an ancient object so powerful that legend says even a Roman emperor couldn’t control it.
In the first book of the Century quartet, Italian author P. D. Baccalario begins a mystery that will take four cities and four extraordinary kids to solve.
Jeremy Robinson - Pulse(Chess Team Adventure) - Published by Thomas Dunne Books - U.S
Imagine a world where soldiers regenerate and continue fighting without pause, and where suicide bombers live to strike again. This is the dream of Richard Ridley, founder of Manifold Genetics, and he has discovered the key to eternal life: an ancient artifact buried beneath a Greek inscribed stone in the Peruvian desert. When Manifold steals the artifact and abducts archaeologist Dr. George Pierce, the United States Special Forces Delta operative, Jack Sigler, callsign King, and his 'Chess Team' - Queen, Knight, Rook, Bishop and their handler, Deep Blue - give chase. They must save Pierce and stop Manifold before they change the face of genetics - and human history - forever.
Fifteen-year-old Tom helps his father run a print shop in London. When he and old Dr Harker hear of a curious murder in the City, with the victim pierced by an arrow and holding a card of 'Death and the Arrow', they are intrigued. And as more victims are discovered, the mystery closes more tightly.