The pocket guide "Know Your Needles" by Liz Kettle is a gem.
Perfect for purse, pocket or quilting supply bag. I love the pictures
for every kind of needle (close ups and total needle shots).
The pocket guide details characteristics, sizes and tasks of the needles.
Threads to use and which fabrics work best for the specific needle.
I love the included pages on specialty needles, like carpet sharp needles and bodkin needles for example. Know Your Needles, you can't go wrong.