Nature Mysteries

Learn how fossils teach us about dinosaurs.

What’s Mac B.'s newest top-secret mission? Travel to Iceland and retrieve the ravens that were stolen from the Tower of London...before Britain is ruined. In Iceland, he discovers secret submarines, hungry polar bears, mysterious blueprints...and his old archnemesis! Is the KGB man behind this birdnapping? Can Mac get the ravens to safety? It's time for an epic top-secret smackdown between these two secret agents!

It's the first day of quail season, and Plato the Bird Dog is missing. At first, Hank is willing to let him stay lost. But when Beulah pleads for help, Hank caves in and takes off in search of Plato. Before he can catch a scent of spotted bird-dog, he finds himself face-to-face with an angry mother hog and her litter. Can Hank's quick wits help him out of this fix? Or will he become hogmeat?

In the 1870s, grasshoppers known as Rocky Mountain locusts destroyed crops and farms across the Great Plains states, then were never seen again. Where did these bugs come from and where did they go? That's the great grasshopper mystery!

There's a burglar on the loose, and he's robbing houses with the help of a supersneaky, super-stinky, secret weapon. When this character comes sniffing around Slim's bachelor shack, Hank the Cowdog heads right into action. But does Hank have what it takes to save the day even after getting caught in the spray of some very unsavory artillery?

Just when the perfect mystery arises, Simone goes missing. This sounds like a job for Tabitha the Undercover Moth!

When the Aldens hear that Mr. Wood's cat Spotzie is missing, they immediately help out by putting up "LOST CAT" posters and going door-to-door with a photograph of the cat. But along the way, they meet some strange characters, receive frightening phone calls, and even find a cat that looks just like Spotzie - but is it? It seems that the more they search, the more mysterious the mystery becomes!

Judy Moody is in a mood. A sleuthing, Nancy Drew kind of mood. So what’s a WBMS (world’s best mystery solver) to do? Go find a mystery, that’s what! And she doesn’t have to snoop for long: when Mr. Chips, a beloved crime-dog-in-training, goes missing, Judy Drewdy and her chums, agents Dills Pickle (Frank), Spuds Houdini (Rocky), and James Madagascar (Stink) find themselves smack-dab in the middle of a real-life, scare-your-pants-off whodunit. Was Mr. Chips stolen by dirty dognappers? And why are chocolate-chip cookies disappearing all over town?

Arthur's friend Buster is searching for a crime to solve. So when the quarters Arthur has collected for Mrs. MacGrady's charity drive mysteriously disappear, Buster is committed to cracking the case. Will Buster be able to prove Arthur's innocence so that he can attend the class picnic?

Cattle call. A gang of marauding dogs is threatening the calf population on the ranch, and Hank knows that it's up to the Head of Ranch Security to do something about it. But instead of being outside where he can fight off the fiends, Hank is trapped inside - at the mercy of Slim and his dreaded vampire sweeper!

Emily the Strange: 13 years old. Able to leap tall buildings, probably, if she felt like it. More likely to be napping with her four black cats; or cobbling together a particle accelerator out of lint, lentils, and safety pins; or rocking out on drums/ guitar/ saxophone/ zither; or painting a swirling feral sewer mural; or forcing someone to say "swirling feral sewer mural" 13 times fast.... and pointing and laughing.

Legal investigator Finley O’Sullivan has had a difficult year in the wake of her husband’s murder. But in her line of work, there’s no time to grieve. Her job is to protect the firm’s clients and defend their innocence through grueling investigative work. Ellen Winthrop is a force to be reckoned with in the financial world. In a male-dominated industry, she shattered the glass ceiling by empowering and promoting women. But now her husband is dead, killed in the Winthrop family home—and she stands accused of his murder.

Harold and Chester could hardly believe it. The Monroe family was going on vacation without them. Bunnicula, the family rabbit, would be boarded with a neighbor. But they, the family's loyal dog and cat, were to be sent away with strangers; they were to spend a week at Chateau Bow-Wow. Chateau Bow-Wow, observed Chester,soon after they arrived, could more properly be called Howliday Inn. Though what was howling, neither of them knew. Chester had his suspicions, however; only a werewolf could make that chilling sound.

This bundle includes Basil of Baker Street, Basil and the Cave of Cats, Basil in Mexico, and Basil in the Wild West.

Walter the Cat is a star, but is he too famous for his own good? The Boxcar Children must find out who's trying to ruin this cat's career!

Hank the Cowdog and his trusty partner, Drover, are just beginning their latest investigation when a pirate suddenly appears on the front porch! Has the ranch really been set upon by one-legged men of the sea? Hank and Drover soon realize that the pirate is just Little Alfred in disguise.

No sooner has Sally May finished planting her vegetable garden when some kind of unearthly being decides to burrow in the neatly planted rows of tomatoes and peppers. It looks like a job for the Head of Ranch Security, so Hank sets straight to work trying to dig the space monster robot out of its hole.

Sometimes I take an opportunity to say good-bye to the cattle and wish them a safe journey. "Well, good-bye, you morons. It was nice having you here at the ranch, but it'll be even nicer having you gone. You ate all our grass and taking care of you was a pain in the neck. Good-bye, good riddance, and don't ever come back."

Sometimes a busy businessmouse like me needs a nice, relaxing vacation. But every time I tried to get away, disaster struck! By the time I finally tore myself away from The Rodent's Gazette, all the good trips were booked up. I found myself stuck in a flea-ridden old hotel, sharing a room with a bunch of Gerbil Scouts!

In this compelling narrative, O'Connor seeks out neuroscientists, anthropologists and master navigators to understand how navigation ultimately gave us our humanity. Biologists have been trying to solve the mystery of how organisms have the ability to migrate and orient with such precision - especially since our own adventurous ancestors spread across the world without maps or instruments. O'Connor goes to the Arctic, the Australian bush and the South Pacific to talk to masters of their environment who seek to preserve their traditions at a time when anyone can use a GPS to navigate.