Joan Holub, author of children's books


by Joan Holub and
New York Times bestselling Tom Lichtenheld

Henry Holt / Macmillan

Amazon B&N BAM

Animated Book Trailer

Book Trailer Storyboard

Teaching Activity Guide pdf

Printable full color Bookmarks:
Side 1
Side 2
(can print on opposite sides of same sheet of paper, then cut out)


Who is that masked number?
And what are people saying about his book?

“While the story would hold all on its own, the tongue-in-cheek humor combined with Lichtenheld’s wonderfully personified cast of characters (complete with sassy speech bubbles and expressive faces) makes this a book kids will reach for again. . . A hero and some villains and good winning over evil (oh, and all that educational stuff, too), all wrapped in humor and tied with a comic bow—what could be better?”
~ Kirkus Reviews

“Tiny visual jokes and graphic elements keep this mathematically accurate book humming with humor, nudging the funny bone of the confident and mathphobic alike. Read this aloud to whet the new reader’s appetite, but there is just so much to see that only a slow reading, with a magnifying glass in hand, will do.”
~ Horn Book

A CCBC Choice

A Chicago Library Best of the Best 2013 book

“Not only reinforces mathematical principles, but also has a great message about friendship and personal feelings. It can be read aloud, alone, or performed as reader's theater.”
~ School Library Journal

“… children ages 6-10 will want to dip into these pages repeatedly.”
~ The Wall Street Journal

“features walking, talking written characters (digits, in this case, rather than letters), accompanied by Lichtenheld’s snappy, cartoon-style art . . . clever ideas”
~ Publisher's Weekly

Featured in the February 2012 issue of Carolina Parent Magazine

Named on SLJ's Scope Notes "The Year in Miscellanea" list
for its fun copyright page. Yay, Tom. This was his idea!