Well, I'm a mom of two kids--not even biologically related to one another at all (one is adopted)--who don't sleep well. And none of the books have worked.
My 3-1/2yo (will be 4 in a few weeks) pretty much sleeps 10-12 hours/day depending on the day and usually closer to the 10 hour amount. She'll nap during the day sometimes (I can increase the frequency of this if I lay down WITH her) but then it pushes back her bedtime without pushing out her wake-up time. And the nap is generally mid-day (1pm-ish) although in the last week or two she's pushed it back earlier in the day (we're coming off a month of traveling around so she may just be out of sorts).
For the most, she sleeps 8:30pm-7 or 8am. If she has a nap, it's usually an hour (but sometimes two!) and then bedtime can be as late as 9:30/10pm without a change in wake-up time. I do not EVER let her nap at 4 or 5pm. Yowza.
ETA: mine still wakes at night. At least once. But she is also still taking in quite a few of her calories via hypoallergenic formula due to swallowing issues with solid food and for a long time, this was a caloric need. However, at this point, I honestly think the waking is a habit that we're working on.