Dale Jr. does not have any children.
Yes, there are many biographies on Dale Jr.
Off the top of my head... Lee and Richard Petty Richard and Kyle Petty Kyle and Adam Petty Bobby and Davey Allison Dale Sr. and Dale Earnhardt Jr. Dale Sr. and Kerry Earnhardt Ned and Dale Jarrett Dale and Jason Jarrett
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A lot
Dale Earnhardt Sr. led 107 laps in the 1998 Daytona 500.
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Dale Earnhardt Sr. had just one start, the first race of the season. It was the 2001 Daytona 500, in which Dale Sr. was killed on the last lap.
Dale Jr. has one older half-brother named Kerry. He also has two sisters, an older sister named Kelley and a younger half-sister named Taylor Nicole.