DEAR CRABBIT: question about covering letters

As this blog winds down, I have a final question for Dear Crabbit:

Dear Crabbit
I've just finished reading Dear Agent, and I wish there had been such a straight forward, helpful book around when I first started submitting my writing to publishers and agents!

I hope you don't mind but I have a query about the 'cook paragraph'. I don't have many writing credits - 2 e-published short stories (via