"Greek and Roman demigods from the Prophecy of Seven must work together to seal the Doors of Death--and help Percy and Annabeth escape the Underworld in the process"--

Demigod Percy Jackson, still with no memory, and his new friends from Camp Jupiter, Hazel and Frank, go on a quest to free Death, but their bigger task is to unite the Greek and Roman camps so that the Prophecy of Seven can be fulfilled.

Great changes are in store for the highly creative and somewhat eccentric Applewhite family when money problems force them to open a summer camp for gifted children, who almost immediately begin to rebel, while a mysterious interloper watches from the woods.

Seven-year-old Bean is too young to go to the camp her sister Nancy is attending, so she and her best friend Ivy decide to create their own camp.

Percy Jackson is a good kid, but he can't seem to focus on his schoolwork or control his temper. And lately, being away at boarding school is only getting worse -- Percy could have sworn his pre-algebra teacher turned into a monster and tried to kill him. When Percy's mom finds out, she knows it's time that he knew the truth about where he came from, and that he go to the one place he'll be safe. She sends Percy to Camp Half-Blood, a summer camp for...

After a traumatic school year, camp counselor Goldie Easton is excited to reunite with her two best friends at an elite summer camp, but when a local boy is found dead on the grounds, all three must reveal a dark secret to find the murderer.

"Thirteen-year-old Clay, a boy who no longer believes in magic, tags graffiti on his classroom wall and, as punishment, is sent to a camp for wayward kids located on a volcanic island, where eccentric campmates abound, a ghost walks among the abandoned ruins of a mansion, and a dangerous force threatens to erupt with bad magic"--

"Four former friends are transported back in time to a pivotal summer in all of their lives during a camp reunion"--

Married, pregnant, and living at a "fat camp" in Maine, sixteen-year-old Eleanor has many questions about her future, especially whether the marriage will last and if she should keep the baby.

Clay and the Secret Series Allies confront the white-gloved members of the mysterious Midnight Sun cabal.