Transcript for Jimmy Fallon is a bestselling author
This is your third children's "This is baby." Yeah. This is the first two. See the mama and da da. These are favorite books in my house. Alec loves when it goes hee haw. He does all the voices of this. A Fallon gave it to me. Her first name is Fallon. The inscription is listen to all the fallons in your life. That's cute. It's a cute book. The thing about my books -- as a tired parent I can tell you -- you can read it as fast as possible. You can read this whole book in 45 seconds if you want. You can take your time too. You can look at colors. The boyfriend is an octopus. It's parts of the body for kids. It's cute. You can go these are your knees, eyes and nose. Then they play with the baby and interact. What I'm finding from these things -- I did it first as a joke because I felt it was funny. I wanted my baby to say da da first. Kids started reading the book back to their parents. I started to get videos of kids reading and getting positive feedback and they're laughing. The parents are laughing with the children. It's starting their journey of reading and enjoying reading. They love reading books. That's the biggest thing in the world. Awesome. It's really fun. We have a great illustrator. Miguel Ordonez. I didn't realize you could do this. What camera do we look at? I didn't realize you could do that. Cute. I'm curious. Yeah. Would your old English teachers be surprised you're a "New York Times" best selling author? Absolutely. They're probably freaking out right now. That's the kid? He's the one? The one that chose Danielle Steele over any other book? Remember the sentences are these are baby's toes. I'm an author. It counts. It's helping parents and kids. Yes, it's the best. Louise Gallagher wherever you are I love you. She's my English teacher. She's great. Louise is here? Wait. Is she? I thought the show gagged me. I'm like we got Louise? She's here? No, she's not. Jimmy, we have multiple blonde moments between the blonde and not so blonde. Trust me. That was one of them.
This transcript has been automatically generated and may not be 100% accurate.