A Turing Award-winning computer scientist and statistician shows how understanding causality has revolutionized science and will revolutionize artificial intelligence "Correlation is not causation." This mantra, chanted by scientists for more than a century, has led to a virtual prohibition on causal talk. Today, that taboo is dead. The causal revolution, instigated by Judea Pearl and his colleagues, has cut through a century of confusion and established causality -- the study of cause and effect -- on a firm scientific basis. His work explains how we can know easy things, like whether it was rain or a sprinkler that made a sidewalk wet; and how to answer hard questions, like whether a drug cured an illness. Pearl's work enables us to know not just whether one thing causes another: it lets us explore the world that is and the worlds that could have been. It shows us the essence of human thought and key to artificial intelligence. Anyone who wants to understand either needs The Book of Why.

Award-winning author Dashka Slater spins a tale of friendship, magic, and eternal life in The Book of Fatal Errors, an evocative and witty middle-grade fantasy. Rufus doesn’t just make mistakes – he makes fatal errors. Clumsy and awkward, he feels entrapped by his teasing classmates and their constant laughter. But now it is summer. Rufus is free. He roams the wildlands of his grandfather’s mysterious homestead, blissfully unaware of the danger up ahead. And there is much danger. Rufus and his snooty cousin Abigail soon become entangled in the tantalizing world of the feylings, mischievous fairly-like creatures desperate to find their way home. In helping the feylings, Rufus tumbles down a dark path rich with age-old secrets and difficult truths. Any move he makes might be his final fatal error. Or perhaps, his most spectacular beginning.

Collects practical jokes of different difficulties, from sabotaging a victim's drink to short-sheeting a bed to fake lottery cards.

One of the great allegorical masterpieces of world literature, Cancer Ward is both a deeply compassionate study of people facing terminal illness and a brilliant dissection of the "cancerous" Soviet police state. --Publisher