Wholesale Monster and Me 5: The Impossible Imp by Cort Lane

[Little Bee Books] Freddy and F.M. have to navigate jealous feelings about new friendships while an imp causes trouble for them at the palace! Freddy has made his first new friend at school, and F.M. feels a little insecure about Freddy bringing him for a sleepover. Meanwhile, Freddy feels jealous that F.M.'s friend Binsa is hired as his dad's lab assistant, since he thinks he should be the only one helping his dad out. Can they learn to all work together to help Freddy and his friend when they're trapped below the palace by the imp?