As her senior year of high school starts, Laurel is just beginning to adjust to Tamani's absence when he suddenly reappears, telling her he must guard her against the returning threat of the trolls that pose a danger both to her and to Avalon.

"A mysterious creature is running wild and terrorizing a village of Vikings. Can three little girls uncover the source and put an end to the mayhem?"--Back cover.

Eleven-year-old Suzy Smith joins the troll-operated Impossible Postal Express, but she botches her first delivery by stealing a cursed snow globe containing a boy who claims there is a plot to take control of the Union of Impossible Places.

When Anna and Kristoff agree to babysit the toddler trolls, they expect to spend an easy night relaxing by the fire.

"Poppy discovers different musical Trolls! Can she get them to sing in harmony?" -- page [4] of cover.

"Three unexpected friends find a gruff yet kindhearted troll underneath their local Pittsburgh bridge who teaches them the importance of friendship and raising their voices"--

When Trollee gets stuck in a tree, Mike uses his knightly skills to help rescue him.

Trolls Harper and Poppy search for the perfect project to showcase at Harper's pop-up art gallery, but when Harper gets too focused on perfection, Poppy must use her positivity to snap her out of it.

Tiny Diamond is nervous about his first day of school, but he learns to make new friends at music time.