I've read a LOT of them.
These are the ones to buy (and I would link to them except my Mac doesn't like the windows blog program and I can't make it work so you get the LONG url, and also I can't make it underline, sorry.)
1) Healthy Sleep Habits: Happy Child by Mark Weisbluth
This book made my kids sleep. It was annoying and dry, but it damn well worked. For infants. And toddlers. And parents. Just do what it says and don't ask twice.
2) Your One Year Old by Louise Bates Ames
They also make Your Two Year Old, Your Three Year Old etc....
Basically, what the heck is my kid supposed to be doing, and what am I supposed to be doing about it. No, really. Not like What to Expect, because those people are not really humans who get frustrated and tired. For example in Your Four Year Old it basically says, "You should try to be with them as little as possible, they really like other people better than you and you will clash with them a lot. They should be in preschool, play dates, and daycare. It will be better for everyone in the end." Brutally honest. You have to get over how ancient they are, like how they talk about moving the ashtray out of the way of your one year old. And there was a little stint about spanking that I didn't like, but they were recommended to me by a doc, and they are my go-to books for all things behavioral.
3) Blessings of a Skinned Knee by Wendy Mogel
It happens to focus on Jewish teachings, but don't let that steer you away if you are not Jewish. Basically, it does not preach of entitlement, and encourages you to help your children be participatory in their household, be kind to others, and be a good normal person BECAUSE YOU SHOULD BE. Not because you get a marble or earn a prize, but because that is how people act. Brilliant.
4) The e-book The Three Day Potty Training Method by Lora Jensen
Well, basically, it works as best as anything I could find. And I tried a TON. OF. USELESS. STRATEGIES.