I was a bit annoyed at Ingo for ending so abruptly with a teaser that pretty much said 'find out what happens in the sequel next year'. I mean I felt like complaining to some authority about it. The Tide Knot makes up for it by being even better than Ingo.
The story picks up in a cold and bleak November where Saphire and Conor have moved to the town next to Senara and left their cottage to renters. Conor is more interested in surfing but Saphire cannot let go of the pull of Ingo. Her mother still has no clue but potential stepdad Roger is becoming more and more suspicious. Saphire still believes her dad didn't really drown and is still looking for answers. Again she involves herself in the affairs of the Mer to solve the mystery.
As before, The Tide Knot is written in that same dreamy, euphoric style that makes every trip into the ocean seem like and enigmatic heroin rush. Whenever Saphire is not in Ingo we cannot wait until she just dashes for the shore and whenever she is far out in some current we don't want her to head back to land. It's weird and yet pleasing how she exists in two different worlds and is somehow wise beyond her years (I like children's books that don't insult their intelligence) without seeming cocky.
With the third novel in the series (The Deep) already out, this is looking like a series I am seriously enjoying that sort of popped out of nowhere. I recommend any teenager (or adult, such as myself) to pick up these books.