Final Comments about Onboarding. I highly recommend this book. Let me reiterate the following: So many careers are made, and unfortunately broken, in the very early days, often before the employee even steps into the building because of onboarding oversights. The corporate landscape is FULL of these unfortunate failures. Research out of Harvard shows the cost to be staggering for companies, and the destruction it does to improperly onboarded employees is devastating. Get this book before you hire another employee.