How many books Ray will sign is dependent on several factors including, the time available and the number of fans waiting.
As a general rule, Ray will often limit the number of books signed in one presentation to 3, and then request you join the back of the queue for another turn. This helps to ensure that everyone gets something signed. If time is short, or the venue has other plans, this number could change.
FAQ answers attributed to Raymond E. Feist are copyright by Raymond E. Feist.
It should also be born in mind that the answer given was only applicable on the date written, and to a specific question. You may find further, similar questions, in the FAQ.