For calculations check out: EC&M's Electrical Calculations Handbook (John Paschal Jr.)
For Controls check out: Instrumentation for Process Measurement and Control 3rd edition by Norman A. Anderson
For PLC's Check out: Programmable Controllers Theory and Implementation second edition by L.A. Bryan and E.A. Bryan. This book covers more than just the basics pertaining to all PLC's great book in my opinion.
All these books are super I personally use them all the time for reference along with Mike's collection.