3DPT and readiness question

DD is 20 months old. She signs 'smelly' when she poops, and yesterday she even told me 10 minutes before she actually pooped that she was going to do it. Today she ran over to her potty, sat on it and peed in her diaper. Then she told me she peed (by saying 'pee' and making the pssss sound). She told me two more times today after she peed and we weren't home.

I know the 3 Day Potty Training book is for 22 months and older, but I think she's showing signs of interest and readiness. What do you think?

Also, can someone please send me a copy of the book? jmdcoupons@gmail.com

TIA!