A. H. Johnstone

Kerian Denaris is a desperate man. Cursed for desertion and pursued by supernatural beings, he is obsessed with finding the answer to an impossible enigma. The cure for old age.
Taking passage on the mysterious galleon El Defensor, his travels take him across tempestuous seas, to mythical islands, ancient monasteries and a ships graveyard infested with creatures from nightmare.
Working alongside a colourful crew of misfits, Kerian must finally choose between pursuing his own selfish needs, or defending those of the people around him.