What We Saw at Night Series by Jacquelyn Mitchard

Three teenagers with XP (a life-threatening allergy to sunlight) are a species unto themselves. As seen through the eyes of 16-year-old Allie Kim, they roam the silent streets, looking for adventure while others sleep. On a random summer night, while scaling a building like any other, the three happen to peer into an empty apartment and glimpse an older man with what looks like a dead girl... moreThree teenagers with XP (a life-threatening allergy to sunlight) are a species unto themselves. As seen through the eyes of 16-year-old Allie Kim, they roam the silent streets, looking for adventure while others sleep. On a random summer night, while scaling a building like any other, the three happen to peer into an empty apartment and glimpse an older man with what looks like a dead girl. A game of cat-and-mouse ensues that escalates through the underground world of hospital confinement, off-the-grid sports and forbidden love. less

Allie Kim’s fatal allergy to sunlight, XP, still confines her to the night. Now that she’s lost her best friend Juliet to an apparent suicide, the night has never felt darker—even with Rob at her side.   Allie knows why Juliet killed herself: to escape the clutches of Garrett Tabor, whom the trio saw committing an unspeakable crime. Garrett is untouchable; The Tabors founded the world-famous XP clinic that keeps Allie and Rob alive and their small Minnesota town on the map... moreAllie Kim’s fatal allergy to sunlight, XP, still confines her to the night. Now that she’s lost her best friend Juliet to an apparent suicide, the night has never felt darker—even with Rob at her side.   Allie knows why Juliet killed herself: to escape the clutches of Garrett Tabor, whom the trio saw committing an unspeakable crime. Garrett is untouchable; The Tabors founded the world-famous XP clinic that keeps Allie and Rob alive and their small Minnesota town on the map. Allie can’t rest until Garrett is brought to justice. But her obsession jeopardizes everything she holds dear. Not even Parkour can distract her; nothing reminds her more that Juliet is gone. When Rob introduces Allie to the wildly dangerous sport of nighttime deep diving, Allie assumes he’s only trying to derail her investigation... until they uncover the horror terrible secret Garrett Tabor has hidden under Lake Superior. less