<p>There&rsquo;s a traitor at Monstacademy!</p><p>When Trixie returns to Monstacademy after being suspended, her best friend Gloria doesn&rsquo;t seem herself. To make matters worse, she&rsquo;s suddenly best friends with an exciting new monster. Is the new girl all that she seems, or are the Mean Ghouls up to no good?</p><p>When the most important monster in the country pays Monstacademy a visit, the threat of their school closing hangs over Trixie and her friends like a black cloud. To make matters even worse, there&rsquo;s a traitor in the ranks and Trixie and Colin have to rely on their own wits to save the day once again.</p><p>Will a surprise visit from the Grand High Monster spell the end for Monstacademy?</p>