This is a no-nonsense book which builds up your Travis Picking skills from zero to perhaps not (guitar) hero but at least competency at playing all the basic patterns across all six strings. Right up until almost the end everything follows logically and, so long as you practise, I don't think you can fail to progress. The book's look and feel is pretty basic, but everything is presented very clearly.
Minor faults: 1) the 2nd and 3rd from last pieces are a lot trickier, using I think rather over complex hammer-ons and pull offs which get in the way of practising the other techniques those pieces are supposed to be building; some of the earlier hammer on/ pull off exercises are tricky too. Funnily enough, the last piece, "Over and Out Rag" is a little easier 2) my CD was scratched so I can't play the last few tracks... but I suspect I was just unlucky and, anyway, those tracks are just full versions of songs you've already learned.
This book may be a little harder if you are a complete beginner and have to learn the chord shapes as well as the picking patterns, perhaps not the best book if that's you, but still do-able. If you know basic chord shapes and just need to learn the patterns then I'd definitely recommend this book... so long as you do like folk music, because the tunes are VERY folksy and you'll soon find yourself playing pieces about planting corn in the ground and tying blue ribbons around your loves head... so, besides your guitar, all you really need are your sandals!
Once you've finished this book there's a thicker follow on "The art of solo fingerpicking" which I'm just starting... I have a feeling things are about to get trickier! But this book was near perfect for getting the Travis Picking basics.