Jon Gosselin and leadership coach Dr. Sylvia Lafair are writing a book together about the lessons the reality dad has learned as the father of a large -- and famous -- family.

"Jon is still deciding what exactly the book will be about, but knows he wants to focus on his parenting skills," a friend of the father of eight tells me. "There is no deal yet or timeline, but the [interest] in Jon from publishers is huge right now, so he's going to strike while the iron is hot."