(Part of The Charlie Numbers Adventures)

Ben Mezrich and Tonya Mezrich

$10.99

(Book #6 of An Ada Lace Adventure)

Emily Calandrelli

$6.99

Sonja Thomas

$8.99

Jeannine Atkins

$8.99

(Book #10 of Franny K. Stein, Mad Scientist)

Jim Benton

$7.99

Betsy Uhrig

$8.99

(Book #8 of Tom Swift Inventors' Academy)

Victor Appleton

$6.99

(Book #9 of Franny K. Stein, Mad Scientist)

Jim Benton

$6.99

(Book #7 of Tom Swift Inventors' Academy)

Victor Appleton

$6.99

Robert C. O'Brien

$8.99

Danny Wallace

$9.99

(Book #6 of Tom Swift Inventors' Academy)

Victor Appleton

$6.99

(Part of The Charlie Numbers Adventures)

Ben Mezrich and Tonya Mezrich

$8.99

(Part of George's Secret Key)

Lucy Hawking

$10.99

(Book #5 of Tom Swift Inventors' Academy)

Victor Appleton

$6.99

(Book #8 of Franny K. Stein, Mad Scientist)

Jim Benton

$6.99

(Book #5 of Sam the Man)

Frances O'Roark Dowell

$7.99

M.M. Vaughan

$8.99

(Book #4 of Tom Swift Inventors' Academy)

Victor Appleton

$7.99

(Book #4 of Frankie Sparks, Third-Grade Inventor)

Megan Frazer Blakemore

$6.99