Helen Plum Library

While visiting a ranch near Yellowstone National Park with his parents, Summer, and her parents, Teddy Fitzroy investigates the disappearances of bison and an irreplaceable necklace

Eva's teacher, Miss Featherbottom, is getting married, but when her special necklace disappears, Eva and her friends set out to track down the thief and return the necklace before the wedding

One day, Mac (smartest boy in his class in a small town in California) receives a telephone call from the Queen of England, recruiting him to find the crown jewels (well, actually just the Coronation Spoon) and so Mac embarks on his first adventure as a secret agent--with the assurance that the Queen will give him a note excusing him from school

While visiting his girlfriend Summer in Malibu, Teddy stumbles upon two mysteries involving a blown up whale explosion and a string of beach sand thefts, but his investigation is sidetracked by a rumor that his girlfriend is dating a celebrity, leading him to question their relationship

There is a legend that if the ravens at the Tower of London ever leave then Britain will fall, so when somebody steals the birds, the Queen calls for Mac B. to find the thief and retrieve them--a mission that takes him to Iceland, where he encounters secret submarines, hungry polar bears, and his arch-nemesis from the KGB

Told in two voices, Jax and Kavita, Kavita's brother Vik, and new friend Kenny try to return the baby dragon to the realm of magic before anything else goes wrong

When Koko Dodo's secret chocolate sauce is stolen just before an important cooking contest Didi, a dodo bird, devises a daring plan to help--whether he wants her to or not.--

Nax and a handful of other space Academy washouts are the only surviving pilots after the school is hijacked by terrorists, but in order to spread the truth about the attack, Nax and his fellow failures must execute a dangerous heist

Birdie Gaux's dog, Bowser, considers himself in charge of security at 19 Gentilly Lane, so when the house is broken into Bowser wants to find the man with the limeade aftershave (and the cat) responsible--but nobody seems to know what the culprits were looking for, or why a strange girl is asking questions about Birdie's father, a policeman who was killed in the line of duty years before Bowser was adopted

When a young Chinese girl is kidnapped and a manuscript stolen, Nancy and her friends decide to help Mr. Soong solve the mystery