John Little - Into the Storm: Book 4 in the Little John Chronicles (The Little John Chronicles - An epic young adult fantasy series)

A relentless blizzard fractures John and his fellowship, but when a towering giant pursues an aged friar through the snow, their infighting must be cast aside. Stepping into battle, they quickly become added to the monster’s prey. Salvation lies behind the gates of a secluded monastery—yet within its ancient walls, secrets stir, and danger lurks in the shadows. As John continues his quest, he faces more than just monstrous foes: his friends begin to turn on one another, a forbidden spark kindles between him and Vixen, and the fate of the world hangs by a thread as they search for the fourth Arthurian artifact. The Thief King's army is growing, and John must prove himself worthy of the title he never asked for. The fourth book in the Little John Chronicles is a sweeping tale of brotherhood and betrayal, myth and magic, love and war.