Discover a cheap way to learn everything

After a fun time at school, Issei goes back home to read about magic, cause other than girls and boobs, magic is basically the best thing ever.

He had asked Sona for more books about the supernatural world, magic, Mythology creatures, and of course even about Devils. It would be important to know about this for what he would do in the future.

Though that doesn't mean he would like what comes next, reading.

Seriously, Issei felt like he had done more studying than he ever did, there is too many things he has to know about.

If this is the simplified version that Sona had shorten it for the reincarnated devils, he does not want to know what is the original one, this damn book had 100 chapters just about why all magic circles are circles.

"Though I guess it is expected, Sona said that apprentice has studied their whole lives to practice magic. What much could I accomplish under a week." It would seem that he is just gifted at Runes thanks to his Sacred Gear, including anything that involves in writing magic. Maybe he should learn those talismans, it seem very fitting and close to his homeland.

"Maybe I should become a devil," Issei said to himself. From what he learn, Devils magic is more based on imagination rather than calculation, In other words, they are gifted while humans requires effort.

The peerage system are also interesting and maybe a pain, other the fact he could get a harem with it. The rating game is required to show increase in rank. Not to mention he would start as a low class devil first and foremost.

"Hmmm? Where did I read those?" He could have swore he read the info somewhere, looking through the stacks, he see ones about Devil Society.

"Yup, pretty sure I never read it." And on too, Issei could feel some lingering knowledge, as if an odd feeling.

There is nothing else on the book other the name on the front cover.

"Wait,,," front cover, could it be?

Issei just had an odd Idea, and a simple hyphotesis, though it has no real basis, something called out to him as if he should test what his Ownership could do.

He added the sentence right next to "Hyoudou Issei" making it "Hyoudou Issei's knowledge".

Immediately the lingering knowledge became a full on encyclopedia, as if a damn broke and the leak became a streaming flow of knowledge.

"This, this is-" So his Ownership could also do that, Issei thought, every knowledge on the book coming into him, yet he it didn't overwhelm him as much, he could understand each of them clearly.

Almost as if he Ownership to it. "Hmph, Ownership," Guess owning specific things of the object has it uses.

"Wait, does that mean I could cheat my way through studying." This is his best ability he thought, even if it is a cheap way?

"Yosh, let's speed things up,"

"Ooof, maybe cramming all those knowledge is not a good idea, my head is splitting..." the highschool boy groan as he lay on the floor, books

Issei is dearly regretting cramming all the knowledge in an instant, it felt like some is water jet cutter.

Though he can remember vividly of all the knowledge that just entered his memory lane, it's obvious that he would need to go slow and steady.

Raising his right hand, a circle appear as he does a few calculations and formula that he remembered. A wisp of flame float above his palm.

"Hehe, even so, time to test my power!"