Michaelangelo, You Made Me Smile (Book 3)
The third book in the TMNT series. Julie and Naomi are back in the lair, and with one surprise coming, and too quick, they need all the help in the lair as they can get! But after Julie disappeared, Mikito, or Cindy as she is known in her human form, is with the FootClan! So how will the gang get a friend back on their side?