1.5
Now, I know it's a little unfair to expect a series to be at its strongest on its sixth book, but... hoo nelly.
The ostensible plot involves a couple attempting to save a magical, alternate dimension island which has been infested with aliens which force a sea witch to do bad stuff like sink islands into the sea and turn people into stone (see also: Narnia.)
Well, okay, whatever, we've still got a romantic couple who are gooily romantic, right? Wrong. Very wrong.
Princess Purple Eyes is a magic princess who is a semi-corporeal ghostish creature who turns solid, uh, when she feels like it. Mr. Hotness is a modern-day fisherman from the Oregon coast. Why they get together is abundantly unclear, especially since her internal monologue the whole time consists of "Whoo! I'm banging a COMMONER who is SOOO COMMON!" His dialog consists of crass, cringey pick-up lines-- the kind that would get a drink thrown in his face on an earth bar, so I'm not sure why they're working on fantasy royalty.
Fortunately, the author, also gave up on this couple about halfway through and devotes the remaining time to a cast of more interesting side characters who either have their own books coming up or who require additional mushy denouements to previous books that I didn't read.
Any and all relationship tension is solved by the fact that Princess Whatserface gets pregnant and now he needs to stay with her and love her forever because there is a baby coming. This is not cringey at all.
There really is a scarring lack of chemistry.
Not interested in more of the series.