Guardian — C.S. Kendall

What if Ponce de Leon was right, and there truly exists a fountain of youth somewhere? Would you take a drink? Indeed, everything you've heard is true, but only half-true. Such a fountain exists, and the water gives life. But it demands it too. Once a sip is taken, the waters within come calling, awakening a need within those who have had a drink to kill so the water can replenish the stores of life giving power flowing from the fountain. But there is a safeguard--a family who has passed down guardianship of the water from generation to generation. Guardian tells the story of Norman, who struggles to come into his new role and ultimately makes a decision that will alter the course for those across the generations who have taken a drink from the deadly spring.