"Core Curriculum for Critical Care Nursing" by J. Alspach
"AACN Advanced Critical Care Nursing" by K. Carlson
"The ICU Book" by P. Marino (also the Little ICU Book, pocket sized, same author)
"Cardiac Nursing" by S. Woods, et al.
"Handbook of Hemodynamic Monitoring" by G. Darovic
Edwards Lifesciences webpage: Critical Care Professional Education