Made Powerful - Myra King

Book 2 in the horseriding series for readers aged 9+, Apley Towers!
In the shade of the Giant's Throne Mountain, and on the coast of the Indian Ocean, Port St. Christopher is home to Apley Towers; a riding school for girls and boys, young or old, who learn what it means to be a true horse rider.
When a mysterious new rider arrives at Apley, Kaela and Trixie are immediately on the defensive. Not only is she dangerously talented, she insists on wearing expensive sunglasses whilst she rides. Who is this Sunglasses-Girl and why does she persist in pointing out Kaela and Trixie's flaws?
It's down to Kaela to solve the puzzle of Angela May, and figure out a few things for herself along the way.
About theApley Towersseries: Set in the shade of Giant's Throne Mountain on the South African coast of the Indian Ocean, this adventure- and friendship-filled series stars the students of a horseback riding school,Apley Towers, who learn valuable life lessons with horses and humans alike. Kaela, Trixie, Angela, and Phoenix learn what it means to be a true rider and a good friend, with plenty of detail of the African animals and landscapes of the area that readers will love. All titles are also leveled for classroom use, including GRLs.