King Arthur has issued a challenge. The first knight to find the sword Edgecalibur will be the next king. Join Sir Cumference, Lady Di of Ameter, and their son, Radius, as they race to help their friend, Vertex, find the sword and discover the secrets of cubes, pyramids, cylinders, and cones.

Join Sir Cumference, Lady Di of Ameter, and their son Radius for wordplay, puns, and problem solving in this geometry-packed math adventure. King Arthur was a good ruler, but now he needs a good ruler. What would you do if the neighboring kingdom were threatening war? Naturally, you'd call your strongest and bravest knights together to come up with a solution. But when your conference table causes more problems than the threat of your enemy, you need expert help. Enter Sir Cumference, his wife Lady Di of Ameter, and their son Radius. With the help of the carpenter, Geo of Metry, this sharp-minded team designs the perfect table conducive to discussing the perfect plan for peace. The first in Sir Cumference series, Sir Cumference and the First Round Table makes math fun and accessible for everyone.

Read Along or Enhanced eBook: While riding through the forests of Angleland, cousins Per and Radius realize they are lost and are desperate for a map to guide them home. Soon they come across a mysterious house in the hills. Inside they find a map to a treasure belonging to Xaxon Yellowbearyd, the fiercest Viking warrior of his time. Per and Radius must decode the strange numbered grid on the map, while trying to steer clear of the pack of bungling bandits who are on their tail. Will they find the treasure in time?

For fans of the Sir Cumference series with Pi on their mind, here is the second installment in this fun look at math and language. This time the math adventure is centered around a potion that changes Sir Cumference into a fire-breathing dragon. Can Radius change him back? Join Radius on his quest through the castle to solve a riddle that will reveal the cure. It lies in discovering the magic number that is the same for all circles. Perfect for parent and teachers who are looking to make math fun and accessible for everyone.

When Sir Cumference and his wife, Lady Di of Ameter, host a massive surprise birthday party for the king, they must figure out a way to quickly count all the guests who are in attendance.

Read Along or Enhanced eBook: The eighth book in the popular Sir Cumference series, SIR CUMFERENCE AND THE OFF-THE-CHARTS DESSERT introduces readers to different methods of collecting data. Sir Cumference and Lady Di of Ameter are in a pickle. The castle cook is sick and the Harvest Faire is coming up—who will make the special dessert for this annual event? Two bakers in town, Pia of Chartres and Bart Graf, are up to the task. But after sampling Pia’s delicious pies and Bart’s scrumptious cookies, Sir Cumference and Lady Di just can’t choose! They come up with a solution: hold a contest and let the townspeople choose the dessert to be served at the faire. When Pia and Bart’s methods of tracking their votes fail, they each realize they need to come up with a better system. Pia places a colored candy around the edges of a pie dough and Bart stacks his cookie molds—each color candy or mold shape represents a different kind of pie or cookie. Thus, the pie chart and bar graph are born! But when the contest ends in a tie, Pia and Bart concoct a hybrid recipe that everyone enjoys.

Join Sir Cumference and the gang for more wordplay, puns, and problem solving in the clever math adventure that introduces readers to the concepts of area and perimeters. When young Per visits her uncle Sir Cumference and his family, she learns how to play the game, "Inners and Edges." After she finds a clue linking the game to the mysterious castle on the island of Immeter, she must figure out how to find the perimeter and area of a circle to unlock the island's secret. Fans will love cracking the code with Per and the gang in this new installment of the Sir Cumference series that makes math fun and accessible for all.

After sacrificing himself to save the world, this epic conclusion of Hellboy's story follows him on a journey through Hell, where he once again faces off against the Vampire of Prague, pleads his case when accused of murder, and fulfills his destiny by destroying Pandemonium itself. This deluxe, oversized hardcover edition collects Hellboy in Hell: The Descent and The Death Card, plus an expanded sketchbook section. Mignola's complete Hellboy in Hell saga! ""The prophecies are coming to pass, the threads all coming together. It's a thing of true beauty, really. When it comes down to it, Mike Mignola creating, writing, and drawing the character feels like one of the most important things to ever happen to the medium . . . Epic, perfectly paced, and profoundly dark. Hellboy is comics. It's what the medium is all about."--Nerdist "Hellboy in Hell may be Mike Mignola's masterpiece . . . Mignola's sparse illustration is given deep, complex mood thanks to Stewart's transfixing color palettes. Grab the first volume, sit down with both of these monsters, and sink into the storytelling."--The Creator's Project

How far could you hop?If you hopped like a frog...you could jump from home plate to first base in one mighty leap!Did you know that a frog can jump 20 times its body length? Or that an ant can lift an object 50 times its own weight?Read this book and find out what you could do -- if you had the amazing abilities of animals! And there are endless possibilities for making more hilarious comparisons of your own. Get ready for ratio and proportion like you've never seen them before!

This book is aligned with the Common Core State Standards for fourth-grade mathematics in geometry: (4.G.3).Once you start looking, you can find symmetry all around you. Symmetry is when one shape looks the same if you flip, slide, or turn it. It's in words and even letters. It's in both nature and man-made things. In fact, art, design, decoration, and architecture are full of it. This clear and concise book explains different types of symmetry and shows you how to make your own symmetrical masterpieces. Notes and glossary are included.