"Do your kids know how the free market works? Ethan and Emily Tuttle have grown up taking for granted the many things they use: clothes, cars, homes, backpacks--even something as simple as a pencil. In this fun adventure to an amazing factory, the twins learn why even the common pencil is a miracle--one that nobody actually knows how to make--and how the process by which it is made is the key to prosperity in our modern age. Based on the classic essay...

Taking the Fowl jet without permission before it mysteriously explodes over Florida, the Fowl twins are placed under house arrest until Myles's questions about what really happened lead to an astonishing abduction.

Everything Aaron has worked so hard to build in Quill has crumbled. Fallen from the height of power and influence and left for dead in a foreign place, Aaron has lost everything, and now he must humbly beg for food from those who saved his life. In Artime, Alex chooses his people over his brother and abandons his search for Aaron, closing the door on that relationship forever. The Artimeans need his focus now more than ever as they face the terrifying...

Twelve-year-old Rowan is next in line to be Queen; her twin brother, Rhydd, to be Royal Monster Hunter. Rowan would give anything to switch places, but the rule is, the oldest child is next in line, even if she is only older by two minutes. She resigns herself to admiring her royal monster hunter aunt's official sword and having tea with dignitaries with her mother, the queen. But a tragic event breaks up longstanding rules, and now Rowan finds herself...

Squishy and her twin "bonus" sisters Vee and Jessie are intrigued when a Ming vase disappears from the apartment above them, especially when they find out it is apparently one of a set stolen during the Opium Wars--and when they hack into the apartment building's security cameras and see what appears to be the ghost of a Chinese warrior they are determined to investigate the mystery.

Reeling from three years of anti-magic rule--and three years disconnected from twin witches Dani and Dorian--Princess Monica, Nico, Damien, and Prince William know that it is now their responsibility to save the kingdom, and their friends, before darkness prevails. Determined to uncover the circumstances of Dorian's disappearance and rescue reigning Queen of Witches Dani from her mysterious curse, the group comes together for one final epic adventure....

Twins Alfie and Alfreeda are trying to cope with Freddie, a beagle who is terrified of thunder during a particularly stormy week at the Hound Hotel--and Alfie is astonished realize that his normally bossy sister shares Freddie's fear.

Alfie Wolfe is a lot messier than his twin sister Alfreeda, but he may have met his match in Dudley, an English bulldog with a serious drool problem--and it is up to Alfie to care for and clean up after him at the Hound Hotel.

Twelve-year-olds Tinn and Cole, raised as human twins in sleepy Endsborough, risk their lives in the Wild Wood, Oddmire Swamp, and the Deep Dark to learn which is a goblin changeling with an important mission.

Twin girls Sarit and Allie have always been coached in basketball by their father, but now that their parents are divorced and he has moved away, Sarit is unhappy playing on the school team, and resentful that her sister still enjoys the game.