In this fourth book in the popular series, Theodosia sets off to Egypt to return the Emerald Tablet--embedded with the knowledge of some of the ancient world's most guarded secrets. Accompanied by her cat, Isis (smuggled along in a basket), Theo plans to return the artifact, then explore the mysteries surrounding her own birth and oh, yes--help her mother dig up treasures on her archeological expedition. But nothing ever works out as planned, especially when a precious treasure appears suddenly, and then just as suddenly disappears . . . When the Serpents of Chaos get involved, Theo finds she's digging up a lot more than she expected! This highly praised, exciting middle grade series is a must for fans of mysteries, humor, and nonstop action.

Being able to detect black magic isn't all tea and crumpets--and for Theodosia Throckmorton, it can be a decidedly tricky business When Sticky Will drags Theo to a magic show featuring the Great Awi Bubu, she quickly senses there is more to the magician than he lets on . . .
Meanwhile, back at the Museum of Legends and Antiquities, Henry is home for the spring holidays and discovers an artifact that alchemists have been hunting for centuries. Soon, every occultist in London is after it.

Is there no rest for the travel worn and weary? Not if you are Nathaniel Fludd, world's youngest beastologist-in-training. All Nate really wants is to track down his missing parents, but when a unicorn falls mysteriously ill, Nate's Aunt Phil makes it clear where beastologists' duties lie: with the beasts who need them.
If ministering to the creatures of the world isn't difficult enough, Nate and Aunt Phil must also keep them safe from a villainous man. Will Nate ever find the parents he is so absolutely convinced are alive?