The Starlight Stables Gang Series 2 Books Collection Set By Esme Higgs, Jo Cotterill (The Starlight Stables Gang & Jessie and the Star Rider):

The Starlight Stables Gang:
Summer has always loved horses but she never thought she'd be able to learn how to ride them - not with money being so tight at home. Then she discovers the Starlight Stables where she meets a new gang of friends and learns how to ride in return for helping-out with the horses. It's a dream come true! Summer falls in love with life at the stables and especially with Luna, a beautiful dapple-grey pony. But one day, Summer arrives at the stables to find that Luna has been stolen in the night. It's up to the Starlight Stables Gang to follow the clues and rescue Luna before it's too late!

Jessie and the Star Rider:
Fans of Clare Balding and Jacqueline Wilson will love this fun and heartwarming new adventure series for animal-mad 8-12 year olds from superstar equestrian influencer Esme Higgs! After solving the mystery of the stolen pony, the Starlight Stables Gang are ready to have a relaxing summer and enjoy the Haversham Horse Trials, but things aren't as sunny as they seem. Can the Starlight Stables Gang band together and work as a team once again, or will it prove too much for one of the friends?