Longest opening book moves?

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Avatar of BlunderMaster-123

I only know these 2 lines:

Are there any book moves longer than these?
Avatar of blueemu

In my game against the team from Malaysia, I played a book line in the Sicilian Najdorf and played a novelty (a new move in a known book position) on move 28.

Avatar of Sussyguy4890
If you can repeat moves you can have a 100 move book move game