Have you ever seen something that wasn’t really there? Heard someone call your name in an empty house? Sensed someone following you and turned around to find nothing? Hallucinations don’t belong wholly to the insane. Much more commonly, they are linked to sensory deprivation, intoxication, illness, or injury. People with migraines may see shimmering arcs of light or tiny, Lilliputian figures of animals and people. People with failing eyesight, paradoxically, may become immersed in a hallucinatory visual world. Hallucinations can be brought on by a simple fever or even the act of waking or falling asleep, when people have visions ranging from luminous blobs of color to beautifully detailed faces or terrifying ogres. Those who are bereaved may receive comforting “visits” from the departed. In some conditions, hallucinations can lead to religious epiphanies or even the feeling of leaving one’s own body. Humans have always sought such life-changing visions, and for thousands of years have used hallucinogenic compounds to achieve them. As a young doctor in California in the 1960s, Oliver Sacks had both a personal and a professional interest in psychedelics. These, along with his early migraine experiences, launched a lifelong investigation into the varieties of hallucinatory experience. Here, with his usual elegance, curiosity, and compassion, Dr. Sacks weaves together stories of his patients and of his own mind-altering experiences to illuminate what hallucinations tell us about the organization and structure of our brains, how they have influenced every culture’s folklore and art, and why the potential for hallucination is present in us all, a vital part of the human condition. 

From the award-winning author Katherine Rundell comes a “rare and magical book” (Bill Bryson) reckoning with the vanishing wonders of our natural world. The world is more astonishing, more miraculous, and more wonderful than our wildest imaginings. In this brilliant and passionately persuasive book, Katherine Rundell takes us on a globe-spanning tour of the world's most awe-inspiring animals currently facing extinction. Consider the seahorse: couples mate for life and meet each morning for a dance, pirouetting and changing colors before going their separate ways, to dance again the next day. The American wood frog survives winter by allowing itself to freeze solid, its heartbeat slowing until it stops altogether. Come spring, the heart kick-starts itself spontaneously back to life. As for the lemur, it lives in matriarchal troops led by an alpha female (it’s not unusual for female ring-tailed lemurs to slap males across the face when they become aggressive). Whenever they are cold or frightened, they group together in what’s known as a lemur ball, paws and tails intertwined, to form a furry mass as big as a bicycle wheel. But each of these extraordinary animals is endangered or holds a sub-species that is endangered. This urgent, inspiring book of essays dedicated to 23 unusual and underappreciated creatures is a clarion call insisting that we look at the world around us with new eyes—to see the magic of the animals we live among, their unknown histories and capabilities, and above all how lucky we are to tread the same ground as such vanishing treasures. Beautifully illustrated, and full of inimitable wit and intellect, Vanishing Treasures is a chance to be awestruck and lovestruck, to reckon with the beauty of the world, its fragility, and its strangeness.