I just received 3 copies of this book called "Making the Right Moves: A Practical Guide to Scientific Management for Postdocs and New Faculty, second edition". You can request a free copy at this address: http://www.hhmi.org/resources/labmanagement/order/main In this book, it criticizes some PIs who stipulate work hours for lab members. It is a great read for a lot of people. Enjoy!