An easy read for the easy price of free via Prime Reading. Good enough that I will probably spend the $4 for each of the sequels in the next week or two.
The balance of real quantum theory and made up stuff was OK, and the puzzles of the communication devices were nice. The analogy to explain how 3D space appears from a fourth dimension was very reminiscent of how it was described in The Three Body Problem. In the afterword the author does cite The 4th Dimension by Rudy Rucker as "a fun book about dimensions" so maybe that is a prior work that both of them built on.