Follows three young operatives of a Psychic Detection Agency as they battle an epidemic of ghosts in London.

"Lockwood & Co. are hired to investigate Edmund Bickerstaff, a Victorian doctor who reportedly tried to communicate with the dead, while Lucy is distracted by urgent whispers coming from the skull in a ghost jar"--

Sophie's talents are getting stronger and, with the elusive Black Swan group ignoring her calls for help, she is determined to find her kidnappers but a daring mistake pushes her world to the edge of war, and soon she has exposed a a major conspiracy that could threaten all she loves.

After the Neverseen prove how vulnerable she is, Sophie decides to learn how to fight, but battle training won't help her friend facing a different kind of danger.

Claire doesn't believe in ghosts, even though her dad is a ghost hunter on TV. But then her dad disappears. And a strange boy in her class, Lucas, knows something about ghosts. One of them has a message for her: Her dad has been taken, and he's in grave danger. Together, Claire and Lucas set out for the town of Hush Falls, where her dad was last seen. Legend says that a tall man in a dark tattered coat lurks near the local reservoir, and anyone who...

Everywhere that Christopher Lane turns, he sees the face of the boy he killed. There is no escape from the guilt, not even on his return to Myers Holt, the secret London academy where he and five others are being trained to use their mental powers, their Ability. But now that the threat of Dulcia Genever has been dealt with, his friends are too busy working for the police, entering the minds of some of the country's most dangerous criminals, to sympathize....

"Anthony, George, and Lucy investigate new hauntings, track down assassins, and a new assistant joins Lockwood & Co"--

"With the help of some unexpected, and rather ghostly, allies, Lockwood & Co. must battle their greatest enemy yet, as they move ever closer to the moment when the earth-shattering secret of 'the problem' will finally be revealed"--