"Vienna, 1954: After losing everyone she loves in the final days of World War II, Ingrid Bauer agrees to a hasty marriage with a gentle Soviet embassy worker and follows him home to Moscow. But nothing within the Soviet Union's totalitarian regime is what it seems, including her new husband, whom Ingrid suspects works for the KGB. Inspired by her daughter's birth, Ingrid risks everything and reaches out in hope to the one country she understands and...

Still yearning to be reunited with her beloved Jaimy, Jacky Faber continues to collect intelligence for the Crown as she leads guerrilla attacks against Napoleon's forces, poses for the artist Francisco Goya, is kidnapped by the Spanish Inquisition, and travels with a gypsy caravan.

Artie begins training as a secret agent but soon finds that his large size, small brain, and lack of fingers make an Apatosaurus unfit for running, hiding, and using a walkie-talkie. Includes discussion question and dinosaur facts.

In 1931 Shanghai, two Nationalist spies pose as a married couple to investigate a series of brutal murders causing unrest in the city.

Portugal, 1944. Recruited by British intelligence to help uncover Nazi secrets of atomic warfare, math prodigy Andrea Aspinall soon disappears into the crowds of Lisbon, hiding behind a new identity. Karl Voss, an attaché for German intelligence, arrives in the city under the purported agenda of helping the Reich, all the while secretly working to save his beloved home country from annihilation under their reign. Two lost souls meet in a city filled...

Teen spy Alex Rider is sent to a maximum security facility in Gibraltar to impersonate Julius Grief while seeking information about a new criminal organization called Nightshade.

In her alternate England of 1851, while taking her friend Sidheag by train to her werewolf pack in Scotland, sixteen-year-old Sophronia uncovers a plot that threatens to dissolve all of London into chaos and must decide where her loyalties lie once and for all.

Targeted by a disabled former spy for the Crown who wrongly believes she is blackmailing his sister, Beatrice Lockwood offers her assistance in tracking down the real culprit and eventually falls for the spy only to find herself hunted by a mad scientist who would resurrect a dead lover.

In 1942, twelve-year-old Stick Lawson and her two best friends, Rain and Neb, set out to discover the Nazi spies they believe are helping orchestrate U-boat attacks on American ships off the coast of Hatteras Island.

Elementary school secret agent Amelia continues her efforts to save the world from evil geniuses and criminal masterminds, this time foiling a jewel thief, identifying some unusual cat burglars, and evading a weed army.