[Pilgrim's Progress]

The four gospels were written to display Christ in four distinct roles.

Matthew as the “King of the Jews” . . . even supplying a detailed genealogy to prove His right to the throne of David.

Mark presents Him as the “servant of man”. The book was directed to the Romans showing Him as doing the job that God sent Him to do.

Luke presents Him as the perfect man, and is directed to the Greeks.

John was written to the world at large and is meant to show that Jesus Christ is very God of very God - the eternal God that became man.

So they are not simply retellings of the same story.

[Elsie]

And any library's biographical section has multiple books about Lincoln; Washington; any famous person that have been written by different authors.

I'd dare say that none of them tell the same story about each individual either.