When Professor Philip Mortimer goes to France to assist in solving drastic changes in the weather, he vanishes while investigating the disappearance of his taxi driver, and Captain Francis Blake of MI5 must solve the case before disaster strikes.

Tasked by the queen to close the ‘Septimus Wave’ case once and for all, Captain Blake is facing a daunting task, for many questions remain unanswered. Where did the spaceship buried beneath London come from? What became of Lady Rowana and Professor Evangely? Meanwhile, Mortimer is trying to pull Olrik out of the catatonic state the villain has been in since his encounter with the ship’s occupant. Has the threat to the nation truly been vanquished?

Graphic Novel. The latest book in the graphic novel series.

London's walls resound with the incredible exploits of the 'Yellow Mark.' The spectacular actions of this mysterious criminal are on the increase: holding up the Bank of England, robbing the imperial crown... No one seems able to stop him. He is so audacious that he lets the police know in advance where he will commit his crimes, each time ridiculing Scotland Yard a little more. The apparent ease with which he evades police schemes begins to worry the highest authorities of the country. The Home Office asks Captain Francis Blake to solve the mystery and discover the identity of the man who hides behind the Yellow Mark. The captain immediately takes as partner his old friend, Professor Philip Mortimer, whose scientific knowledge will be invaluable in solving this extremely complex enigma. Who hides behind the Yellow Mark?

When Soviet professor Voronov turns a deadly alien bacteria into a terrifying weapon that could be used to devastate the Western world, agents Blake and Mortimer are drawn into a lethal, shadowy war to defeat him.

Captain Francis Blake, dashing head of England's MI5. Professor Philip Mortimer, world-renowned nuclear physicist. The most distinguished duo of gentleman-adventurers, battling the forces of evil and their arch nemesis Olrik around the globe, below the earth, even across time itself... The 24th adventure of Her Majesty's finest protectors!

The captain and the professor have finally made it to the secret base with the Swordfish blueprints, and construction has begun on the extraordinary machines. Olrik hasn't had his last word, though, and he is ready to take tremendous risks to locate the world's last bastion of resistance and freedom.

In 1930s Paris, the &“Butcher of the Dances&” is on the prowl for young, loose women, and local dominatrix Agatha suddenly turns up dead. Everyone assumes it was suicide, but her sister Blanche is convinced that the Butcher is responsible. She decides to take matters into her own hands, and in her pursuit, she ends up hired into a luxury house of call-girls. She soon becomes adept at certain practices, but she does not lose sight of her ultimate goal—to find her sister's killer. A suspenseful spicy tale as only the French could so lightly get away with, this work is deceptive in its depth and realism.

Deep under Sao Miguel island, rumoured to be the last emerging part of Atlantis, Professor Mortimer has discovered samples of a mysterious radioactive metal. Could it be the Atlanteans' legendary orichalcum? When he and his friend Blake set out on an expedition into the depths to find out, sabotage occurs in the form of their old opponent Olrik. And soon, all three will be embroiled in a power struggle far bigger in scope than they could have imagined.

In this silly sequel to Arabel's Raven, Mortimer floats out to sea on a grand piano, tries to get even with three giraffes that have stolen his doughnuts at the zoo, and takes off with King Arthur's sword. Will Arabel ever be able to control her troublemaking pet raven?