Ive always wanted to learn to play the guitar,i dont get much time with work and training but i could spare an hour or so a day!

I did start to learn a few years ago when i was at college but soon gave it up when i started work! So i know the basic but what would be the best way of improving,any tutorial book recommendations?

Also id rather study at home as i dont think i would have time to go to lessons!

Thanks Guys...Gals!