Oh yeah. The book that not only didn't go anywhere, but apparently a current resistance force on the HB planet isn't even enough for Toby to want to leave Earth and retake her people's home and free the slaves within. Even though I think she had to be tricked into leaving at the end of the book in the first place.
I once mentioned an idea of the series continuing by the Anis going there, but someone said it wasn't their fight. and they made some excuse for Toby not going, even though there are living Horks that would probably want to be free and live on their planet, instead of being guests on an overcrowded planet where the more extreme locals kill you just for being a little different.
Another pointless plot that could have gone somewhere, but didn't.