Robert Heinlein young adult asked 120 days ago by Naomi G. - no answers yet

I just discovered that Robert Heinlein has a whole series of young adult books. I have two nephews that love to read, they loved the Hunger Games as well as other fantasy, but like the mysteries also. They are eleven and twelve, and both pretty sophisticated readers for their age. Does anyone know if the Heinlein books can stand the test of time? Would young boys reading the young adult fiction out now, like these books?

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