From Edgar Award-nominated author Martha Freeman comes a "delightful" (Kirkus Reviews) middle grade mystery following a young boy working at his family's secondhand store that is a steal-your-heart story about family and friendship. Arthur Popper helps out in his family's Boulder, Colorado, junk store, Universal Trash, a place so full of cool stuff it inspires awe in first-time shoppers. When it comes to ukuleles, peppermills, and rhinestones, Arthur knows what's what. But unlike his motorcycle-riding grandma and his namesake, King Arthur, he's not brave or adventurous. Then Arthur finds a chipped teacup, of all things, and realizes it's the key to solving the perfect crime--a crime only he knows about. With help from a supernatural sidekick, his best friend, his annoying little sister, and a sad-faced police officer, Arthur embarks on the hard work of detecting. Everyone knows Arthur is good at customer service. Does he have what it takes to solve a mystery and confront a thief?

Twins Mark and Scott discover an abandoned Apollo command module and take off to rescue a stranded Russian cosmonaut in the second Astrotwins adventure from retired NASA astronaut and the #1 New York Times bestselling author of Mousetronaut, Mark Kelly. Mark and Scott Kelly, who are mostly known for getting into trouble, are finally back from their first space adventure. The twins have wanted to explore space ever since they were little and watched Neil Armstrong walk on the moon. And when they hear that a Russian cosmonaut is trapped inside the Salyut space station now orbiting 220 miles above the surface of the Earth, they wish they could find a way to help. While staying in the countryside at their grandfather's house with their friend Jenny (aka Egg), the twins repurpose a NASA Titan 2 rocket ship being stored nearby. Complete with spacesuits and snacks, the twins take off on their rescue mission. Will they ever see their family or their grandfather's backyard again? Written by a NASA astronaut with four space flights under his belt, the second exciting Astrotwins story includes extensive back matter on the space program with fantastic facts and details.

“An inspiring look at women who realized curiosity plus tenacity equals success.” —Kirkus Reviews
“[A] captivating compendium.” —Publishers Weekly

Discover the histories of twenty incredible female scientists in this inspiring biography collection from beloved author Martha Freeman and Google Doodler Katy Wu.

Why do galaxies spin the way they do?
What’s the best kind of house for a Komodo dragon?
Can you cure malaria with medicine made from a plant?

The scientists and mathematicians in Born Curious sought answers to these and many other fascinating questions. And it’s lucky for us they did. Without their vision, insight, and hard work, the world would be a sicker, dirtier, and more dangerous place.

The twenty groundbreaking women—including Rosalind Franklin, Marie Tharp, Shirley Anne Jackson, and more—came from all kinds of backgrounds and had all kinds of life experiences. Some grew up rich. Some grew up poor. Some were always the smartest kid in class. Some struggled to do well in school. But all had one thing in common: They were born curious. Are you curious, too? Read on.

"If you're going to a march, you're going to want a sign"--and this inspiring handbook, which introduces children to the world of action and activism. As more and more children attend the growing number of marches across the country, this cheerful guide serves as a great reference tool and conversation starter for youthful participants. Inspired by author Martha Freeman's own experiences, this picture book addresses many of the questions kids might have: What should I wear? How will I get there? Where will I be able to go to the bathroom? Is it okay to dance? (Yes, it is!). All the while the text stays focused on the fact that the right to assemble is a Constitutional part of our life as Americans . . . whatever our political point of view.

Shortlisted for the Edgar Award for Best Mystery "Mystery lovers will be satisfied by the plot and adults will love the curriculum and social awareness tie-ins." --School Library Journal Eleven-year-old Luis is left looking for answers after a city-wide blackout leads him to an electrifying mystery in this edge-of-your-seat thriller from Martha Freeman. Luis Cardenal is toasting a Pop-Tart when a power outage strikes Hampton, New Jersey. Elevators and gas pumps fail right away; soon cell phones die and grocery shelves empty. Cold and in the dark, people begin to get desperate. Luis likes to know how things work, and the blackout gets him wondering: Where does the city's electricity come from? What would cause it to shut down? No one seems to have answers, and rumors are flying. Then a slip of the tongue gives Luis and his ex-best friend Maura a clue. Brushed off by the busy police, the two sixth graders determine they are on their own. To get to the bottom of the mystery, they know they need to brave the abandoned houses of Luis's poor neighborhood and find the homeless teen legend known as Computer Genius. What they don't know is that someone suspects they know too much, someone who wants to keep Hampton in the dark. In this highly charged mystery, two can-do sleuths embark on a high-tech urban adventure to answer an age-old question: Who turned out the lights?