The politics and terrors of biotech, human engineering, and brain science are given startling fictional form in a selection of short stories with Michael Blumlein's signature mix of fantasy, science fiction, horror, and wicked humour. The title piece, 'Thoreau's Microscope,' is a stunning mix of hypothesis and history, in which the author inhabits Thoreau's last days to explore the politics of impersonal science and personal liberation - a journey as illuminating as it is disturbing.