The Pony Pals are alarmed when their horses disappear in the middle of a storm.

Lulu's father asks the Pony Pals to spend time with a friends's daughter. Though Melissa Prince is the same age as the Pony Pals, they have nothing else in common.

Lulu and Snow White find a letter written in 1918 hidden in a jar. The letter is from one young girl to another, who both seem to like ponies as much as the Pony Pals. Lulu and her friends can't figure out why the two hid notes to stay in touch. The only way to find out is to ask them, but will they be able to find them? Illustrations.

It's a mystery! When 5-year-old Rosalie stops by to show Lulu her brand-new pet, the hamster makes a run for it. Lulu is sure it's somewhere in her house. But if her grandmother finds it before the girls do there's going to be BIG trouble...and poor Rosalie will have to give up the only pet she's ever had. Never fear! There's no mystery too big (or small) for three best friends and their ponies to solve. Lulu's pony, Snow White can sniff out a hamster in a second. But how can the pony help if the hamster is indoors? Snow White may have to go where no pony has gone before.

As Pam rides her pony, she happens upon Cloud, Maggie the Magician's pony. Cloud seems skittish and frightened by people. Pam, Anna, and Lulu set out to learn about Cloud's past. The truth they uncover is disturbing, but it may be the key to giving Cloud a better future. Illustrations. Copyright © Libri GmbH. All rights reserved.

Snow White and Acorn are fighting. They bite each other and they can't even stand to be in the same paddock. All this tension causes a big blowout as Lulu and Anna defend their ponies. Pam is caught in the middle. Can Pam use her newly discovered gift for communing with ponies figure out what's causing the upset before Anna and Lulu decide they don't want to be Pony Pals anymore?

The Pony Pals hunt for Sandy Nation and her horse when they disappear.

Accepting a new job helping to train two new ponies, Pam begins to fear that the job is interfering with her social life when her long hours and lack of availability are not understood by Lulu and Anna.

Amy lives and breathes horses, but all her horses are in books or in her head. So when she goes on a picnic with her friend Hannah's family, Hannah thinks Amy is imagining things when she says she heard a horse neigh nearby. But then Hannah hears a neigh, too! What's a horse doing in the park? With a little help from Mona at the Rainbow Street Shelter, Amy makes sure the horse is safe and sound. She almost hopes the owner never turns up, so that she could keep visiting the pony. . . .

Prior to 1870, the series was published under various names. From 1870 to 1947, the uniform title Papers Relating to the Foreign Relations of the United States was used. From 1947 to 1969, the name was changed to Foreign Relations of the United States: Diplomatic Papers. After that date, the current name was adopted.