How can the two noble verses be reconciled: "But as for him who is given his record in his left hand" and "But as for him who is given his record behind his back"?

The reconciliation between the two is that the servant will take his book with his left hand from behind his back. The recompense is of the same nature as the deed. So, just as he cast aside the Book of Allah behind his back, he will be given his book on the Day of Resurrection from behind his back, as a just and fitting recompense.