On a black night In Denmark, evil prowled the streets. For eleven-year-old Peter Andersen and his twin sister Elise, living in the city of Helsingor, Denmark during World War II means German soldiers in the streets, German patrol boats in the harbor, and German fighter planes in the sky....  more

On a black night In Denmark, evil prowled the streets. For eleven-year-old Peter Andersen and his twin sister Elise, living in the city of Helsingor, Denmark during World War II means German soldiers in the streets, German patrol boats in the harbor, and German fighter planes in the sky. Everyone is nervous, especially their Jewish friend Henrik and his parents. Before the invasion, no one in Denmark cared whether a person was Jewish. Now the Nazis are secretly rounding up all of the Jews who live in Denmark and sending them to prison camps in Germany. Suddenly, Henrik and his family must escape! Sweden offers the only place of refuge, but with soldiers lurking the streets and Nazi boats patrolling the sea, only a miracle can get the Jews to safety!

The British pilot was about to become a prisoner of war. Spending the summer at their uncle's farm off the west coast of Denmark promises Peter and Elise Andersen freedom from the constant German patrols and bomb sirens that plague their home town. But on their first night at the sheep farm,...  more

The British pilot was about to become a prisoner of war. Spending the summer at their uncle's farm off the west coast of Denmark promises Peter and Elise Andersen freedom from the constant German patrols and bomb sirens that plague their home town. But on their first night at the sheep farm, a British bomber is seen lighting up the night sky its engines in flames! The plane crashes into the icy waters of the North Sea, but by the time they arrive, the pilot has struggled to shore and hidden himself in the thick woods. Knowing they must find him before the German soldiers do, Peter, Elise and their cousins begin a feverish search for the endangered British pilot. The guard dogs are barking and the German trucks are rumbling in the distance will Peter and Elise be able to rescue the pilot in time?

The Nazis were after them, and there was nowhere to hide - Twelve-year-old Peter and Elise Andersen have secretly taken on a risky new assignment delivering illegal newspapers for the Danish Underground! Bringing news of freedom and deliverance to the people of Denmark seems like the perfect...  more

The Nazis were after them, and there was nowhere to hide - Twelve-year-old Peter and Elise Andersen have secretly taken on a risky new assignment delivering illegal newspapers for the Danish Underground! Bringing news of freedom and deliverance to the people of Denmark seems like the perfect way to help fight the Nazis until soldiers nearly sabotage their mission. Is class troublemaker Keld Poulsen spying on Peter and Elise? Will he report them to the Nazis? Armed with secret code names, Peter and Elise must elude Keld in spite of his threats. When the Nazis plot to raid newspaper headquarters, the twins rush to help their friends in the Underground but will they find themselves cornered by German soldiers?

Their enemies will stop at nothing to get revenge- World War II may be over, but for Danish twins Peter and Elise Andersen, the adventures are just beginning! Uncle Morten and Lisbeth return safely from Sweden, but the joyful reunion takes a tragic turn when an arsonist torches the Anna...  more

Their enemies will stop at nothing to get revenge- World War II may be over, but for Danish twins Peter and Elise Andersen, the adventures are just beginning! Uncle Morten and Lisbeth return safely from Sweden, but the joyful reunion takes a tragic turn when an arsonist torches the Anna Marie. A series of menacing threats convince the twins that someone is out to destroy Uncle Morten for his work with the Danish Underground. But who? And why won't the adults take the warnings seriously? When Peter and Elise uncover a cruel plot to ruin Uncle Morten once and for all, they find themselves caught up in a frantic race to stop the culprit before he strikes again!

Miles at sea and no way to escape... Rumors of missing Nazi treasure are rampant in Europe in the wake of World War II, and Denmark, home to twelve-year-old twins Peter and Elise Andersen, is no exception. Hoping to strike it rich, Peter, Elise, and their friend Henrik begin investigating...  more

Miles at sea and no way to escape... Rumors of missing Nazi treasure are rampant in Europe in the wake of World War II, and Denmark, home to twelve-year-old twins Peter and Elise Andersen, is no exception. Hoping to strike it rich, Peter, Elise, and their friend Henrik begin investigating the mysterious site of a recent sinking in Helsingor Harbor. But when the twins and Henrik discover they are not the only ones interested in the sunken ship, their sleuthing leads them into greater danger than they ever imagined! A split-second decision lands the three on a renegade German submarine staffed by a crazy crew that refuses to admit defeat. Suddenly, Peter, Elise, and Henrik are the only witnesses to a plot to smuggle priceless treasures out from under the noses of the Allied victors!

Time is slipping away-is it already too late?News of Peter and Elise Andersen's latest adventure has traveled fast all the way from Helsingor to Copenhagen and King Christian. The twins are thrilled when the well-loved Danish monarch invites them to visit him at his palace.But on the train to...  more

Time is slipping away-is it already too late?News of Peter and Elise Andersen's latest adventure has traveled fast all the way from Helsingor to Copenhagen and King Christian. The twins are thrilled when the well-loved Danish monarch invites them to visit him at his palace.But on the train to Copenhagen, Peter and Elise have a frightening run-in with a gruff German who is extremely protective of his travel bag and its curious-looking contents. Soon, the mysterious man begins to show up everywhere the Andersens go! The German's keen interest in an antique key Peter finds adds to his suspicions about the man's motives. What can he possibly be up to?Convinced the German is a threat, Peter turns spy and discovers that King Christian may be in danger! But will Peter and Elise be able to warn him in time?

A missing plane, a daring plan and no time to lose! Peter and Elise Andersen and their friend Henrik Melchior are worried when Henrik's mother and a family friend, Matthias Karlsson, fail to return from a short flight to Sweden. Has something happened to Mattthias's plane? Then a...  more

A missing plane, a daring plan and no time to lose! Peter and Elise Andersen and their friend Henrik Melchior are worried when Henrik's mother and a family friend, Matthias Karlsson, fail to return from a short flight to Sweden. Has something happened to Mattthias's plane? Then a mysterious caller informs Peter that Ruth Melchior and Matthias are being held by the Russian forces occupying the Danish island of Bornholm. The charge: spying! But the line goes dead before Peter can ask any questions. Frantic, Peter, Elise, and Henrik set sail for the island with Uncle Morten at the helm of the Anna Marie. But their arrival is met by secretive Russian soldiers who deny keeping any prisoners. How can Peter and the others persuade the Russians to release Mrs. Melchior and Matthias when the soldiers will not even admit they are there?

They'd always trusted him until now-.A morning flight over Helsingor turns dangerous when the pilot, Matthias Karlsson, blacks out without warning. Almost as terrifying is the find thirteen-year-old Peter Andersen makes in the cockpit a hidden handgun! When Matthias comes to just in time to save...  more

They'd always trusted him until now-.A morning flight over Helsingor turns dangerous when the pilot, Matthias Karlsson, blacks out without warning. Almost as terrifying is the find thirteen-year-old Peter Andersen makes in the cockpit a hidden handgun! When Matthias comes to just in time to save their plane from crashing into the sea, Peter puts the shocking discovery behind him for the moment.Certain Matthias is hiding something, Peter persuades Henrik Melcoir to join him in spying on the man, and the friends witness a suspicious nighttime meeting with a foreign ship captain. What's worse, a mysterious stranger appears to be spying on Matthias, too.Suddenly, Peter, Elise, and Henrik find themselves at the center of a dangerous plot. If Matthias is involved, are the Melchoirs in danger also? If so, Peter may be about to lose his best friend!