The amateur gentleman vs The Devil You Know: Which Should You Read?

Both live on shelves: London, Thriller, Fiction

The amateur gentleman Jeffery Farnol · 1900 ★★★★☆ 3.9 624 pages · ≈ 11 h 33 m · Challenging Find on Amazon

The Devil You Know

The Devil You Know Mike Carey · 2006 ★★★★☆ 3.8 472 pages · ≈ 8 h 44 m · Moderate Find on Amazon

The verdict

Ratings are close: 3.9 vs 3.8 — either is a safe pick by score.
The Devil You Know is the quicker read — about 8 hours vs 11 for The amateur gentleman.
The Devil You Know is the easier read (Moderate), The amateur gentleman more demanding (Challenging).