While volunteering at the local zoo, Robyn, Nick and Trevor learn that grizzly bears are being poached and their gall bladders removed for use in alternative medicine. Always ready to solve a mystery, the kids set out to find the poachers. Bear is not only big game, they learn, but big money to poachers. The stakes are high and the suspects many, as the kids head into their most dangerous adventure yet.

Trevor, Robyn and Nick decide they have a mystery to solve when Trevor discovers a suspicious looking young man snooping around. They learn about missing research involving the use of carob beans to aid in cancer treatment-potentially valuable information. With a shady looking grad student, a bitter activist and an employee of a medical research firm to deal with, our amateur sleuths are faced with their greatest challenge yet.

Trevor, Nick and Robyn are ready to solve another mystery. When bobsledder Josh Gantz is accused of deliberately injuring a fellow competitor, he runs the risk of being thrown out of the sport—right before the World Cup. Courtney Gantz asks Trevor, Nick and Robyn to help clear her brother's name. Can they find out who framed Josh? What is the meaning of the strange coded messages they keep finding around Olympic Park? Who eats orange bananas, anyway? The kids must unearth the clues in a race against time, before Josh's championship dreams end up on ice.

When Trevor, Nick, and Robyn visit the Royal Tyrrell Museum of Palaeontology a mysterious chain of events raises questions about a new paleontology dig.

Jason's rough moves on the ice nearly got him kicked out of the hockey league, but he's learned to keep his aggression in check. Now he's on an elite team and his new coach is pressuring him to return to his old ways. If he doesn't toughen up, he might lose his spot on the team. But if he starts playing dirty, he could get kicked out of the league. Jason finds himself fighting to play fair in this exciting and often comic sequel to Power Play and Danger Zone.

Reese loves horses and longs to be a competitive show jumper. When the leased horse she rides is sold, she is left riding the orneriest horse in the stable. She decides she must find a horse of her own. Her parents can't afford a trained horse, so she decides to buy a wild horse at auction. Outbid, she discovers that many of the wild horses will be sold for slaughter. Determined to save the horses from a terrible fate, she finds herself in deeper than she expected-and fighting for her life.

When Mitch Harding makes an impulse buy, he really goes big. He spends his entire savings on a wrecked dirt bike after witnessing a rider crash it at an Endurocross race. He is now the proud owner of a used bike, one that needs a lot of work. With the help of his uncle, an ex-pro rider, and new friend Kelsey, a championship rider herself, they get the bike up and running. But a bet with the previous owner threatens to strip Mitch of his hard-earned vehicle. Whoever wins the next race gets to keep the bike. Mitch is determined to win. But partway through the race he discovers Kelsey lying on the trail, her bike on its side. With serious injuries and no way to get help, Kelsey has no choice but to ride out. But as Mitch and Kelsey push to get off the mountain, the path to safety gets more complicated.

Izzy and Julia have been on the same team for years. Izzy is frustrated that Julia spends too much time cherry-picking and getting all the credit when they score. But when someone starts threatening the team and their home field is sabotaged, the friends must work together to find the answers. Why would someone threaten their star player? And what is the connection to a century-old train robbery and the rumor of buried treasure? Trying to solve the mystery and keep the team in the playoff race, Izzy and Julia find themselves in deeper than they thought, and in more danger than they imagined.

Kallana's father has suddenly decided that joining the basketball team will be a "character-building" experience for her. But she can't dribble, she can't sink a basket, and worst of all, she will have to wear one of those hideous uniforms

Would-be detectives Trevor, Nick and Robyn are hot on the trail of a sandwich thief when they learn that more than food has been going missing at school. A valuable hockey book has been stolen from the library, and the kids worry that the librarian might lose her job if it isn't found. Who would steal a hockey book? Could it be Robyn's arch-nemesis and hockey enthusiast Cray? Or could it be Ms. Thorson, the Oiler fan teacher? The kids are determined to solve these mysteries even though their sleuthing efforts land them into trouble at every turn.