Willow's journey continues in VITAL, the fourth book in the INSIGHT series. Combating a crumbling family life, a circle of suddenly inconsiderate friends who seem determined to anger her, and a plethora of emotional trials too numerous to withstand, Willow feels overwhelmed. She has pushed herself beyond her own limits and in so doing has closed her mind. Dreams are no longer coming to her.As she deals with this tumultuous environment, Willow also notices a change in her beloved. Once her source of support and compassion, Landen is suddenly filled with a newfound rage. Fierce and possessive, he forces Willow to wonder whether the bliss of their love has faded away, or if something darker is affecting Landen's soul. Always watchful of Willow, Drake sees this change and the growing rift between the pair. Both he and Willow remember all too well what happened during Venus's passing; will Drake take advantage of Landen's compromised emotions?Amidst all this turmoil, Willow finds herself obsessed with finding her: the elusive twin. The girl who looks exactly like Willow, and who must be Drake's soul mate. Willow knows in her heart that to find this girl will remove a tremendous weight from her shoulders, clearing her mind and heart. But a mysterious warning about the chart of her past forces her to consider this course carefully.And she must consider it soon. Even now, Mars approaches and Willow's most important battle is at hand. Will she finally break beneath the torment the universe has set upon her, or will she stand beside her friends and loved ones as Mars unleashes its wrath?