Is LO falling asleep on the breast? If so he might not be getting to the filling 'hindmilk', he might only be getting the foremilk.
You might want to rule out a supply problem. Do you express? Do you get a lot of milk out when you do?
LO might be getting overtired, a baby that age can't stay awake that long without getting overtired. You might then be thinking his tired cry is a hungry cry. Do you offer him the breast to settle him when he cries? If so he might be in the habit of 'snacking', not taking a full feed. Have you tried a dummy to settle him for naps?
If you like the sound of the EASY routine I would invest in her main book,'the baby whisperer solves all your problems' as this is a far more helpful and comprehensive guide than the 'secrets' book....