Deep Wizardry: The Second Book in the Young Wizards Series by Diane Duane.
I enjoyed the first book, and I had some bad insomnia a few nights back so I selected this which I figured would be a fast read and help me drop off. It did (at 3:30 am) and was nice to read about the aquatic area I grew up (near Tiana Beach, though I would go away every summer to avoid the influx of visitors). Oh how cute, they call EQ a “Hamlet”, but I didn’t think it was a Town, last I knew it was a village, and not incorporated like Quogue. But what do I know ? I haven’t lived there proper for over a decade.