Book 5 in the Christie and Agatha's Detective Agency series! ‘Einstein will be all ready to deliver his oh-so-important speech … only to find that he doesn’t have the equipment to deliver it with!’ Christie dreams of a train adventure – the kind she’s read about in fiction. But Christie and Agatha’s journey aboard the Green Express, with company including Albert Einstein, is more than even they bargained for. The twins uncover a plot to sabotage the physicist’s radio broadcast, and it’s all up to them to thwart it before their journey ends. About the Christie and Agatha's Detective Agency series: It’s not easy growing up in the 1920s. While Christie can usually be found up a tree or trying a spot of amateur engineering, her shy twin Agatha buries her nose in books and dreams of being a writer. The pair couldn’t be more different. But when a scientific discovery goes missing, they find that together they make a winning combination and Christie and Agatha’s Detective Agency is born. Join the twin detectives as they solve thrilling mysteries all over the world!

Book 3 in the Christie and Agatha's Detective Agency series! 'The truth of the matter is that a number of valuable artefacts have been stolen. There is a thief at the dig!' During the excavation of an Egyptian pharaoh's tomb, Christie and Agatha find themselves at the heart of a mystery. Lord and Lady Carnarvon's dig is in jeopardy unless the thief at the site can be found. But time is quickly running out for the twins to wrap up the case and recover Tutankhamun's treasures. About the Christie and Agatha's Detective Agency series: It's not easy growing up in the 1920s. While Christie can usually be found up a tree or trying a spot of amateur engineering, her shy twin Agatha buries her nose in books and dreams of being a writer. The pair couldn't be more different. But when a scientific discovery goes missing, they find that together they make a winning combination and Christie and Agatha's Detective Agency is born. Join the twin detectives as they solve thrilling mysteries all over the world!

Book 2 in the Christie and Agatha's Detective Agency series! "His intent is more than clear: he'd rather see me and my car lost, than for us to reach the summit." Many are unhappy about Mr Alexander Jr's daring drive to the summit of Ben Nevis, but who is trying to sabotage the record-setting expedition? Willing passengers Christie and Agatha are keen to embark on a rip-roaring adventure, but soon they're embroiled in a thicker plot than they bargained for. About the Christie and Agatha's Detective Agency series: It's not easy growing up in the 1920s. While Christie can usually be found up a tree or trying a spot of amateur engineering, her shy twin Agatha buries her nose in books and dreams of being a writer. The pair couldn't be more different. But when a scientific discovery goes missing, they find that together they make a winning combination and Christie and Agatha's Detective Agency is born. Join the twin detectives as they solve thrilling mysteries all over the world!

Book 1 in the Christie and Agatha's Detective Agency series! "Whoever gave you that sandwich did it deliberately. They wanted to sabotage Fleming's research." When Agatha accidentally eats a major scientific discovery (hidden in a sandwich!), it's a race against time for twins Agatha and Christie to find out who's trying to ruin physician Sir Alexander Fleming's reputation. About the Christie and Agatha's Detective Agency series: It's not easy growing up in the 1920s. While Christie can usually be found up a tree or trying a spot of amateur engineering, her shy twin Agatha buries her nose in books and dreams of being a writer. The pair couldn't be more different. But when a scientific discovery goes missing, they find that together they make a winning combination and Christie and Agatha's Detective Agency is born. Join the twin detectives as they solve thrilling mysteries all over the world!

Travel 100 years back in time with this detective series that fictionalises discoveries and events of the 1920s with a fun whodunnit twist! It’s not easy growing up in the 1920s. While Christie can usually be found up a tree or trying a spot of amateur engineering, her shy twin Agatha buries her nose in books and dreams of being a writer. The pair couldn’t be more different. But when a scientific discovery goes missing, they find that together they make a winning combination and Christie and Agatha’s Detective Agency is born. Join the twin detectives as they solve thrilling mysteries all over the world!  

Book 4 in the Christie and Agatha's Detective Agency series! "If you want to see your cousin again, come to the old quay at seven tomorrow night, alone. Be prepared to be married. Do not involve the police." A relaxing break on the French Riviera becomes a dramatic investigation when famous physicist, Irene Curie, receives a ransom note demanding her hand in marriage. What's more, Christie and Agatha's friend has been kidnapped! Can the twins find out who is behind the ransom note and save both Auguste and Miss Curie? About the Christie and Agatha's Detective Agency series: It's not easy growing up in the 1920s. While Christie can usually be found up a tree or trying a spot of amateur engineering, her shy twin Agatha buries her nose in books and dreams of being a writer. The pair couldn't be more different. But when a scientific discovery goes missing, they find that together they make a winning combination and Christie and Agatha's Detective Agency is born. Join the twin detectives as they solve thrilling mysteries all over the world!