I've been trying to break myself of asking leading interview questions, and in general I found this book very helpful (though how successful my hires are remains to be seen). It walks you through broad, open ended questions and gives thorough explanations of what to look for in candidate answers based on what you're hiring for. The questions are thoughtfully worded to get helpful answers from interviewees, and go beyond "tell me your strengths and weaknesses." There are also chapters for hiring more specific positions (salespeople, admin, remote workers, etc) that are only limitedly useful. Like if you hire teachers I think the first half of the book would be very relevant, while the remainder wouldn't be. There were some 'insights' that were very dated (like 'be careful of millennials because they have no allegiance and lower work ethic'), but I felt those were easily ignored.