Peter:

        Once that you have the texts that others have suggested,
     download a Pspice "student evaluation simulator" from MicroSim.
     This is a great way to go through fast iterations on analog
     circuits -  a great learning experience.  Although the simulator
     is device limited (50 devices/ 2 op-amps) it is very
     powerful.

     http://www.microsim.com

     Regards,

     Tim Crist