sentences:  His previous book, a novel called "Boo", came out in May 2015 with Random House imprints in the US, the UK, and Canada.The book is narrated by a young science geek who finds himself in a heaven reserved exclusively for 13-year-olds.In addition to English, "Boo" has been published in Chinese, Czech, Dutch, French, German, and Portuguese and will appear in Turkish.