Ark Angel is the sixth book in the Alex Rider series written by British author Anthony Horowitz.

The novel is a spy thriller which follows the attempt by the title character, Alex Rider, to stop the space hotel Ark Angel from destroying The Pentagon.

Alex tells Tamara Knight about Force Three, but the soccer player is killed when the medal, made of caesium, catches fire in the shower.

Later, however, Drevin finds out about Alex's true identity from the security chief, Magnus Payne, and decides to have him killed by sending him to dive into a shipwreck, in which he is locked in.

Alex is brought to Drevin, who intends to destroy Ark Angel with a bomb and send the wreckage crashing down on the Pentagon in Washington D.C. As the project has gone over budget and Drevin stands to lose money if he continues to finance it, he plans to recoup his losses with an insurance payout from the station's destruction, while at the same time destroying the CIA's evidence of his criminal activities.

The CIA team storm Flamingo Island and Drevin attempts to shoot Alex in the chaos, but Paul gets hit instead.

Ark Angel explodes and Alex falls back to Earth, landing a hundred miles off the coast of Australia.

Philip Ardagh at The Guardian gave Ark Angel a positive review, stating "It's perfectly pitched at its readership.