While you can't judge a book by its cover, you can judge a book by the first sentence.
From Hollis Gillespie's Unaccompanied Minor
From Agatha Christie's And Then There Were None
From Gina Damico's Waste of Space
From John Bellairs' The House with a Clock in Its Walls
From Anthony Horowitz's Alex Rider: Scorpia Rising
From Anthony Horowitz's Alex Rider: Crocodile Tears
From Kate Messner's Breakout
From Anthony Horowitz's Alex Rider: Snakehead
Suzanne Young's The Program: The Complication
From Rick Riordan's Kane Chronicles: The Serpent's Shadow
From Anthony Horowitz's Alex Rider: Ark Angel
From Ellen Klages' White Sands, Red Menace
From Jeff VanderMeer's Southern Reach: Authority
From Rick Riordan's Kane Chronicles: The Throne of Fire
Anthony Horowitz's Alex Rider: Scorpia
First Sentence of a New World 