Upper Fourth at Malory Towers is the fourth book of the Malory Towers series, written by Enid Blyton. Darrell return to Malory Towers for the fourth year with her sister, Felicity. Jean MacDonald has moved up to the fifth and Darrell is the head of the form. This year they are joined by two new girls — the Batten twins, Ruth and Connie, that look nonidentical and the girls quickly learn that they have very different personalities too. The third new girl is Clarissa Carter. Clarissa arrives to school late, allowing Gwendoline Lacey to twig to the fact that she is an ‘Honorable’.

School’s out . . . and of course that means it’s time for fun! Grace and her friends are always ready for a little adventure, and Grace’s backyard is the perfect place to set up headquarters. Suddenly the lawn is transformed into the center ring of a big-top circus, then a rocket launch pad, and then a hospital emergency room!
The group’s exploits, both real and imagined, provide all kinds of unexpected rewards—and might even land Grace on an actual stage in a real theater production!