My son used to get up 8-10 times a night, every night. I was a sleep-deprived mess, as you might imagine. At first I was sure he was teething, but it just got to be a whole pattern of sleepless nights for both of us. Totally my fault for running to him every time he cried out at all...but I digress.
I had read a few of the sleep books but none quite worked for us until I found "Good Night, Sleep Tight" by Kim West and Joanne Kenen. (My son was 15 months old.) A few weeks after implementing the suggestions in this book (the Sleep Lady Shuffle, mainly) he seriously slept 11 hours straight!! OMG, I was ecstatic!
You might be able to find it at your local library. I have recommended this book to a few friends and they've all had great success with it.
Good luck to you & I hope you can all get some sleep soon!