Recently, I got the book by Andrew Loomis called "Fun With a Pencil." Its a great way for anyone to start drawing as all you need to be able to do is make a shape on a piece of paper. I highly recommend it as a stepping stone for anyone looking to get better at drawing.
Here are my sketches from the book. The top are designs done by Loomis, which I constructed based on the guidelines. The bottom three are my own.