In general, the help option in the PSpice software itself will offer a good idea for circuit simulation. Even you can find the model designs in the software itself which you can extend it for your design.
If you are a beginner to the circuit simulation, you can start simulating by using MULTISIM, a national instruments software which is straight forward and simple to understand. But both uses the same algorithm for simulation.
Even, if you want dedicated detailed book let me know I will send you some softcopy to your inbox.