I strongly recommend Cheers to childbirth[0] which is by far the most useful and practical book I found on what you can actually do to be a helpful partner in the leadup and during the birth. Remember you're not the priority in this situation but you do need to be a partner. Which means being a strong and empathetic advocate for what your wife and baby need. This book will help you understand what that is so you can discuss it with your wife and formulate a plan so that she can focus on getting the primary work done.