I bought Isabella's curtains when we did her room about 3 years ago and I hated them from the start. The colors were blah and the fabric was cheap. So I finally decided to sew my own. I have never really sewn much, I usually give up pretty quickly after starting. I took my time and made sure to measure everything perfectly and pin everything. They turned out fantastic!
I ordered this book:
http://tinyurl.com/23faxv
It had great reviews and started from the very beginning. I can't wait to get it and start sewing more.