For Parents to read with their (approximately) almost two-year-olds: From the What to Expect Kids series. "What to Expect When You use the Potty", by Heidi Murkoff (co-author of What to Expect when your Expecting). Illustrated by Laura Rader. The What to Expect books has Angus the dog as a transitional character throughout the series. So your child can look forward to seeing him again and again, guiding them as a trusted friend.
"What to Expect When You use the Potty," is just about that. Every couple of pages there is a bold faced question a child might ask about the potty. The answer given is explained in an appropriate manner. Hints are given about potty practice which is great. The beginning of the book has a word to the parents about potty education which is nice. The pictures throughout the book do a fine job explaining what's going on. This is a good book to buy or check out of the library. If your library does not have it, ask if another city library has it. Then have it sent to your library branch. This should cost nothing (at least in the U.S.)