I liked the main plot but the main plot is at most 25% of the book, the rest is sometimes funny/clever, often boring interludes that completely destroy the flow and start feeling like annoying interruptions after a while. Didn't finish reading it, dropped it after half the book.

I liked the rational deductions but there just wasn't much suspense in the book, the story was too uneventful to keep me engaged. This is coming from someone who isn't deep into Superman franchise.