M.D.
Dr Sears' "The Vaccine Book"... It explains how each vaccine is made, the pros and cons of giving the shot to your child, and any other information you could ever want about vaccines. It even includes an excellent alternative vaccine schedule, which we used for my son. Instead of giving SO MANY shots at once and so young, its spreads the shots out over a longer period of time and has options for starting them later. My son didn't receive his first shot until he was 5 months old, as opposed to most babies receiving shots starting from the day they are born! I think the whole American Academy of Pediatrics system is CRAZY!