If you have bought my book “Building a Game with Unity and Blender“, you may have realized the sword model shown in Chapter 2 “Creating Characters” is no where to be found in the source files.
Fear not! The sword is actually hidden in Player.blend, which you can unhide by press alt-H in Blender.
Initially I wanted to use the sword model in the game demo. However, eventually I ended up doing punching animation instead of sword-wielding, which is why I hide the sword (instead of deleting it) before moving on to do the animations for Chapter 3.
You can try and unhide the sword, then import it to Unity and parent the sword model to one of the hand bones of the game character. It might even look like sword-wielding when playing the punching animation!