Any pregnancy books out there worth reading?

Molly
First time mom and dad here just wanted to know if any of you already parents or first-timers have read or heard about books that are worth reading. 
Also is there any books for just dads? We have classes that he can take for just dads so he can talk about different things with guys and not just me since a lot of his friends have yet to have children. 
 Due August 6 2016!