Christophe Galfard
Christophe Galfard has written at least 9 books. Their most popular book is The Universe in Your Hand: A Journey Through Space, Time, and Beyond with 25 saves with an average rating of 4.06⭐.
Authorship percentage indicates primary author status - excluding introductions, forewards and other contributions.
Series
6 primary booksAuthored 0% of series
George's Secret Key
George's Secret Key is a 6-book series with 6 released primary works first released in 2007 with contributions by Lucy Hawking and Stephen Hawking.
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