This sounds like terrible 2's to me. That's the misnomer about terrible 2's- you don't have to be 2 yet. My son sounds like yours, when my son was about 16 months old. I researched tons of books and internet sites and found that terrible twos can start anywhere from 15 months and on. My son had a slight speech delay, so I think his tantrums and stuff had a lot to do with the fact that he couldn't talk. He'd get so frustrated because we didn't understand what he wanted. So, it was a little different. I learned through trial and error that the best way to react to his tantrums were to walk away and try to ignore them. When he was done, I would go to him and try to figure out what he wanted. He was in speech therapy as well to try to help. Terrible 2's are rough, but just try to hang in there and remember that we all go through it with our kids. My son also had terrible separation anxiety. I couldn't leave him at all or he would cry the whole time. It was rough. I tried playing little games with him where I would go hide in the other room and ask for him to find me. Slowly start leaving his site for longer periods at a time and it may help. I know it's tough for your husband, but try to leave him with him for a little bit every night if you can. If not, that's ok too. He will eventually switch and want dad all the time. That's normal. I know it's hard on you having him be a constant shadow, but sometimes they just need that reassurance. It won't last too long, so try to enjoy it. :) I don't have any particular books or anything, I just read up a lot on terrible 2's. The biggest thing I can say is to be consistent and don't be afraid to put him in time out for doing things that hurt others, like hitting or biting. He needs to learn now that this is not acceptable behavior. If you wait or are inconsistent, it will delay this stage much longer. Good luck, and hang in there!