"Trapped at a haunted ski resort, Ollie, Coco, and Brian must rely on their friendship and sharp minds if they want to escape"--

"Twelve-year-old Nell Perkins knows there is magic at work that she can't yet understand. Her mother has been taken by witches and turned into a bird. Nell must journey to get her mother back, even if it takes her deep into the Wicked Places, the frightening realm where Nightmares resides. There she must break the spell and stop the witches from turning our world into a living nightmare"--Amazon.com.

Now in Paris with her parents who are filming their TV show about the world's haunted cities, Cassidy Blake (who can see ghosts) and her friend Jacob (who is a ghost) are alert for trouble, especially when the filming takes them into the underground Catacombs, the empire of the dead, where Cassidy accidentally awakens a powerful poltergeist spirit--one whose mystery she must solve before his power in unleashed on the whole city.

Kaz is an ordinary ghost. The wind separates Kaz from his family and carries him to a library far away, and he is scared he will be lost forever. That is, until he meets Claire--a human who can actually see him!.

After Andres discovers a haunted bike park, he calls best friend Desmond, a ghost investigator.

"Kaz and Claire take a trip downtown, hoping to find Kaz's long-lost uncle. Instead, they meet a group of ghosts who live in the movie theater. But soon the ghosts start mysteriously disappearing! Who or what is chasing them away? And can Kaz and Claire bring the ghosts back?"--