What is the title of Stephen Hawking's 2001 popular science book?

Stephen Hawking’s 2001 popular science book was titled The Universe in a Nutshell. It was written for general readers and explored major ideas in modern theoretical physics and cosmology.

The book is commonly regarded as a follow-up to Hawking’s hugely successful 1988 work, A Brief History of Time. Its purpose was partly to bring readers up to date with developments that had occurred since that earlier book, while presenting difficult subjects in an accessible, highly illustrated format.

Among the topics Hawking discusses are Gödel’s incompleteness theorem, black holes, the nature of time, quantum theory, and P-branes associated with superstring theory. The title itself is a wordplay: “in a nutshell” means “briefly,” while also evoking the idea of containing the universe’s complexity in a compact form.

Readers sometimes confuse it with Black Holes and Baby Universes, a 1993 collection of essays, or The Grand Design, published in 2010. The 2001 title is specifically The Universe in a Nutshell.