Moira faces new challenges as she finds herself in the hands of the enemy. Determined to escape and keep everyone she cares about safe, she has to do things she's never even dreamed of doing, including trusting the one who betrayed her... Invisible is the second book in the Tainted Elements series. The Tainted Elements series reading order: DIFFERENT (Book 1) INVISIBLE (Book 2) MONSTER (Book 3) CAPTIVE (Book 4) HUNTED (Book 5) RESILIENT (Book 6)