And Eru Iluvatar caused Gollum to trip over into the fires of Mount Doom with the Ring.

@CMIZAX  

Actually, Daring Doo herself wrote them.

@Drax99  
My headcanon is that different “Daring Do” books were written by different writers together, with one person writing the more adventurey chapters and another writing the romance chapters and so on. Even books publicized to have only one author, actually have many authors; on the cover usually only the one who had the general idea is put as the writer, but several people can also write sequels, and fans can suggest information, and fanon appearances and names of people can become canon.

My headcanon is that Ditzy Do is the author

Nope (in my headcanon).  
Princess Faust [579-663 After Nightmare Moon] was a great historian.  
Daring Do was invented by Gertrude Barbosa [432-491 A.N.M.].

Nah, I still say Twilight Velvet is.