Ohh I see. Yea, that's far too common. Awesome light novel, subpar anime adaption
Yeah unfortunately Lol. Madhouse did a decent a job, trying to fit 6 volumes of content down in a 26 episode anime is not a easy task, especially a series as complex and detailed as Mahouka. With that being said there was still to much wasted potential.
I would recommend reading the novels definitely, here's a download link
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They were originally up on Baka Tsuki, but Yen Press licensed Mahouka so at the price of getting the novels to the states, we lose the ability to read the fan translations online with out downloads. I would still watch the anime though, because it's still enjoyable and watching Tatsuya do cool and badass shit never gets old.
Seeing that you seem to be a fan of Torau Majutsu no Index, you should enjoy this series.