Actually i would disagree, there is a tiny little overlap. But thats to be expected. How many ways can thib say that the frequency with which you train influences the volume that you can use per workout from a recovery standpoint? determining fibre composition for your workouts?
There is stuff in there that you will remember. On the other having thib layout what he thinks from start to finish in detail really helps it click.
Thats the difference. A book starts from the begginning, laying a solid foundation. Then moving on. But the articles… what order did you read them in? did you have other preconceived ideas?
Buy the damn book and tell us if you thought it was worth it.