Wolf Tower has three sequels: Wolf Star; Wolf Queen, and Wolf Wing.
Long story short, if you liked the first one, the next three should be right up your alley. Wolf Star has Claidi acted on again as the prime mover, but she takes over protagonist duties and drives the book to its conclusion. Wolf Queen really plays up a new opponent; poor Claidi’s pretty desperate for most of the book, but the ending’s a huge relief and feels like closure.
The 4th book, Wolf Wing, stretches a bit more. The world’s hybridization of science and magic “goes big” with its focus on Ustareth. The world is filled with more tests and weird new races… which is great for a book focused on the genius inventor/mad scientist Ustareth.
The four books hang together well and offer a compelling conclusion to Claidi’s tale. In the end, they’re approaching a newly stable situation that wraps around well to the first book.