At Animal Ark, Mandy Hope helps her parents treat animals of all shapes and sizes. Even outside the clinic, Mandy can't resist helping any animal in need.

Could it be a ghost horse? Mandy and James are sad because their friend Wilfred Bennett has to sell his riding stables. Things get even worse when Sam Western turns the land into a campsite and wants everyone to forget the stables ever existed. Now campers are telling stories of a ghostly horse and rider passing through the campsite - the vanishing into the night air! Mandy and James don't believe the spooky tales, but can they figure out what is...

After learning that the local animal shelter is in danger of closing for lack of funds, Mandy and her friend James decide to hold a pet show to raise money to keep the shelter open.

It's Christmas at Animal Ark, and Mandy and James have an idea: a party for all the pets in Welford. But when a wounded stray sheepdog turns up, Mandy finds it hard to keep her holiday spirit while trying to save its life.

Jody McGrath and her family are sailing around the world researching dolphins, and Jody records all their exciting adventures in her Dolphin Diaries. In the series' fourth book, Jody is at Dolphin Haven in the Bahamas, where dolphins Bella, Misty, and Evie are about to give birth. Everyone is excited, but also worried. In the past, Evie's calves have died, and this may be her last chance to become a mother. Misty's and Evie's calves survive, but Bella's...