the foundation PHP series is good:
really i would suggest going to the local bookstore and leafing through the books that re available to find the one that suits you best.
there is no 1 to 1 conversion from ASP to PHP.
My Best advice is to approach PHP without the ASP googles on. Don't try to compare PHP to ASP, they are vastly different.
PHP is an Object Oriented language, ASP is a scripting language that does not have the same concept of Object Orientation.
when you approach PHP with the concepts you used in ASP it is the same idea as trying to fly an airplane and using the concepts you leaned when driving a car, your sure to crash that way.