The Librarian Who Measured the Earth 50 hikes with kids New York Times bestselling author

New York Times bestselling author of You Can't Touch My Hair

From an author who has been praised for his "pounding action scenes [and] ferocious prose style" (Marilyn Stasio

from a childhood in England

anxious immigrants and grand tycoons -- and

but to appreciate her life work one must also read her previously uncollected speeches and editorials

The Librarian Who Measured the Earth 50 hikes with kids New York Times bestselling authorA perfect introduction to mathematical concepts for young readers, written by a Newbery honor winning author! This colorfully illustrated biography of the Greek philosopher and scientist Eratosthenes, who compiled the first geography book and accurately measured the globe's circumference, is just right for budding mathematicians, scientists, historians, and librarians! Filled with fascinating details about Eratosthenes's world (and in print since