I've got to say I really like "Walking Golf".
Mr. Swanson not only gives insight into the reasons why it's beneficial for your health to walk when playing, but also tells why it actually improves your golf score... and it really makes sense once you really think about it.
In "Walking Golf" he details 10 reasons why walking the golf course is how to get the most out of your game for more enjoyment, better health, lower scores and a better social outing too.
Plus he gives some great advice on equipment such as carts, bags, shoes - and preparing yourself to transition into the walking game of golf.
Give it a read, I think you'll agree it's a great resource guide.