One for Sorrow (poems)
Shelley: The Pursuit
Shelley on Love (editor)
Gautier: My Fantoms (translator)
Nerval: The Chimeras (with Peter Jay)
Mary Wollstonecraft and William Godwin: A Short Residence in Sweden and Memoirs (editor)
De Feministe en de Filosoof
Dr Johnson & Mr Savage
Coleridge: Early Visions
Coleridge: Darker Reflections
Coleridge: Selected Poems (editor)
Footsteps: Adventures of a Romantic Biographer
Sidetracks: Explorations of a Romantic Biographer
Insights: The Romantic Poets and Their Circle
Classic Biographies (series editor)
The Age of Wonder: How the Romantic Generation Discovered the Beauty and Terror of Science
Falling Upwards: How We Took to the Air