A Street Cat Named Bob by James Bowen

Subtitle: And How He Saved My Life -- This guy in England was a recovering drug addict and was getting his life back in line.  He was a busker in a local park and that was how he was getting by.  One day he came home and found this cat on the doorstep.  He had grown up with cats and knew that this one needed some help.  His intention was to get him taken care of and then let him go.  He was having a hard enough time taking care of himself, he did not need anything else.  Well Bob, the cat, had other plans and stuck with him. Having this responsibility helped James look beyond himself and really work to get better and have a better life.  Simply written but a great story about how something that seems so small can make a huge difference in your life.