My favorite of the series so far. I had fun reading about Friln and Rin. The banter was good and it was fun to see what 10 years together looked like for these two. The emotional impact could have used a bit of work since I usually get teary eyed when one of the MC's is facing death (I did not for this one, shockingly...okay may not so shockingly since we all know how Mrs. Kell writes).
The things being revealed about Thresl anatomy was interesting (some might consider it a bit icky). I look forward to learning what other potential the thresl's hold after reading about what Saint did at the end.