Essence by Lisa Ann O'Kane.epub

Neutrality is the key to longevity. This motto has governed
16 year-old Autumn's life in the mid-21st century Centrist cult, which believes that expressing emotions leads to Essence drain and premature death.

But Autumn's younger brother’s death casts her faith into question.
While sprinting through a park in violation of Centrist teachings, she
encounters Ryder Stone, an Outsider who claims Essence
drain is nothing more than a Centrist scare tactic. She agrees to join
his Community, a utopia of adrenaline junkies living in the
abandoned remains of Yosemite National Park.

Autumn learns about sex, drugs, and living life to the
fullest. But as she discovers dark secrets beneath the Community's
perfect exterior, she realises that this illusion of paradise could be shattered…