Well I have that book too. Anyway, there more than a way to skin a cat.
Other writers such as A. Calfo, R. Fenner and E. Borneman advises to have the skimmer in from the beginning.
They argued that the Ammonia and Nitrite produced by the die-offs may be too great for the bacteria to handle at the beginning of the cycle period.
Unless the LRs are cured, I feel that the Skimmer method is safer.
But thanks for the additional opinion.