Packed full of eccentric characters, thrilling secrets, amazing inventions and breathtaking surprises; this time we find Sam and Marcia on the trail of a secret invention that could change the world.
Of course they aren't the only ones trying to track it down!
Sam and Marcia are back in Edinburgh with Zara, Ben and Professor Ampersand. The friends are helping to build an amazing electric-powered flying boat when they stumble across an old photograph - a clue that leads them on to the trail of a long-lost secret invention that could change the world. But a shadowy organisation is also after the invention. Soon the children are caught up in a perilous struggle that will take them through dimly-lit museum galleries, up into the skies above Europe, down to the murky depths of Lake Geneva, and into the heart of a fortified Swiss castle. This is a breathtaking adventure of encrypted messages, aerial chases and astonishing secrets from the author of "The 7 Professors Of The Far North".
John Fardell works as a freelance cartoonist, illustrator, designer and puppeteer. A regular contributor to Viz (he is the creator of The Modern Parents and The Critics amongst others), his work has also appeared in the Independent, the Evening Standard, the New Statesman, the Glasgow Herald and The List. He is married with two boys and lives in Edinburgh.
