Most of the readers who find this amazing manga are curious about the novel, so I hope this link would help you. Since it was shared in an open forum, I think it's fine to share it here too.
Disclaimer: These summaries were not done by me. It was done by EnigmaticAxiom, raptorfalcon & whsie. They were compiled into PDF format, uploaded and shared by EnigmaticAxiom.
Click: Summaries of Mahouka Koukou no Rettousei [Novel]