A solid 4 stars
1. As a spin-off, it worked!
2. JLA complicated this Luxen-Arum-Human world conflict so that both series, Lux and Arum, have potential for a stronger plot.
3. Secondary characters and a bit of background piqued my interest [especially with a certain thought-to-be man/boy hybrid (LUC)].
4. This 1st in the spin-off amps up the anticipation for Lux book #4!
Full review to come.