I only read the free sample. Which is why I’m not rating this.
From what I did read [prologue and first 4 or 5 chapters], it was grammatically correct and no glaring errors. However, I did feel like I was at a piano recital of a highschooler playing a difficult piece by Mozart. It was technically correctly done, but it was dry and by the numbers.
Nothing I read made me want to buy the whole book.