Spontaneous by Aaron Starmer
Publisher: HarperCollins
Goodreads Summary: 
A novel about growing up ... and blowing up.

Mara Carlyle's senior year is going as normally as could be expected, until- wa-bam!-fellow senior Katelyn Ogden explodes during third period pre-calc.

Katelyn is the first, but she won't be the last senior to blow up without warning or explanation.With the whole country watching, the FBI soon rolls into Mara's suburban New Jersey hometown and the search is on for answers.
Whip-smart and blunt, Mara narrates the end of their world as she knows it while trying to make it to graduation in one piece. It's an explosive year punctuated by romance, quarantine, lifelong friendship, hallucinogenic mushrooms, bloggers, ice-cream trucks, "Snooze ButtonTM" and the filthiest language you've ever heard from
the president of the United States.

Aaron Starmer defies every rule in Spontaneous, but beneath the outrageous is a ridiculously funny, super honest, and truly moving exemplar of the absurd and raw truths of being a teenager in the twenty-first century-and the heartache of saying good-bye.
Rating: 4 Stars
Mara Carlyle isn't have a normal senior year. If drama, talk of prom and sports is normal, then her senior year was perfectly normal... Until Katelyn Ogden exploded. As Mara's classmates explode, she must try and get through senior year alive.

Spontaneous combustion isn't something I've really heard of, or know much about. But in Spontaneous, Aaron Starmer describes the explosions in vivid detail, down to the icky blood splatters on people around what was just a person. Mara's personality is perfect for this tale, her witty jokes on death are under appreciated.

There are ups and downs to this tale, and I think some parts of Mara are built to be "relatable" however shouldn't have been. Those parts seemed to directly contrast with her personality which is why I didn't like them; I would've preferred a not quite as relatable, but a more genuine girl and main character.

Aaron Starmer has created a hilarious tale about some high school seniors who must rally together as their class mates start exploding. From thwarting the FBI to being confined to Covington, these teenagers are thrown around by the "big kids". Spontaneous is a hilarious tale about how being a teenager is a roller coaster and problems no one foresees can appear in your life at any moment.
Purchase Location: ~I received a copy from HarperCollins NZ and willingly reviewed it~
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Recommended for: Fans of honest teen fiction.