If your character uses a bow or crossbow, this ought to be of interest. Opening with a history of the bow and some useful terminology (OK, your character sheet says you can use a bow, but do you sound like it?) there is also a useful illustrated analysis of different arrow types.
This is followed by an explanation as to how the actual weapon cards are laid out and what the information on them means - things like draw-weights, for example: essential information if you are an archer, but a bit baffling for those of us who play them! There are even some real-world archery references to chase up if you are getting interested.
The cards themselves are two-sided, with a picture of the bow on one side and detailed stats and other information on the other. These build up into a handy reference, although a neat idea would be to leave space for you to note the relevant game mechanics for the ruleset that you are using for your game.
A wide number of bows and crossbows - mediaeval up to the ultra-modern - are included. It's an excellent summary of what you might be able to get hold of, so don't just write 'bow' on your character sheet, make an informed choice and get more specific.