Soulless Gail Carriger
This is by no means a bad book but it often rated on websites among the very best steampunk books. It has an interesting concept that of a Women who has no soul so is immune to the attacks of Vampires, Ware-wolves and Ghosts. The best quality of the book is that its female main character is a written as a real women who wants to be a women and not the standard steampunk women who wishes she was a man. Of all the books on this list of overrated steampunk books it is the only one worth reading.
Leviathan Scott Westerfield
This story is a very simple young adult fiction that is regrettably often put on lists of the best steampunk works. It is set during World War 1 which isn’t a traditional steampunk time period. It has some interesting alternate history but the story is simple and not overly original. Steampunk is often done a dis service in the young adult category.
All Men of Genius Lev A.C. Rosen
By far the worst work of steampunk ever written. It has the standard boring steampunk girl character who wishes she was a man. The story written like a play and the steampunk elements of the story are almost an after thought.
The Affinity BridgeGeorge Mann
This story seems as though it was written by a steampunk generating program. It is a bland proto steampunk story that relies on the steampunk cliches of airships and violin playing automatons.
Dreadnought Cherie Priest\
This is the most disappointing steampunk novel on this list. Boneshaker is such an original must read that one must assume that a sequel would be atleast decent but this story is simple and just isn’t that interesting. There is some reference to the Zombies being created from the yellow gas in Boneshaker. Every book in the series after Boneshaker are not worth reading(In fairness only Dreadnought and Ganymede have been read by Steampunkbooks.net so perhaps Clementine or other sequels were descent ).