Use your routine, you can tweek it a little.
1st week
13-15 reps
2mins between sets.
Low nember of sets
2nd week
10-12 reps
90secs between sets
increase sets by 1
3rd week
8-10reps
90secs between sets
increase sets by 1
Now do a growth phase for 4 weeks
3mins between sets 10-12 reps.
decrease number of sets by two from 3rd week
last week go heavy 2-3 reps.
If you read the book, it tells you how you bring body to almost over trainning. Then you back off so your body adapts(growth), then you can start another ramp again.
By changing time between sets it confuses your muscles.
The program from book, expect 15-25lb gain in weight. 21weeks.