I recommend some math books suitable for Grade Nine and Grade One students.

Chu Yang, the Ninth Master of the Nine Tribulations Sword, sacrificed almost everything he had for the sake of improving his martial arts, including the love of his life. After spending three years locating the fifth fragment of the Nine Tribulations Sword, he was ambushed by all sides at that very place. Mortally injured with no means of escape, Chu Yang executed a sacrificial technique by plunging the Nine Tribulations Sword into his very own heart. “With the blood of my heart, ten thousand tribulations will collapse!” After witnessing the death of all his ambushers, Chu Yang’s vision began to darken. At a distance, moments before his death, he saw the mastermind who had plotted his downfall — Mo Tian Ji. With that, his eyes finally closed. However, with a start, Chu Yang once again awoke to find that he had returned to when he was sixteen years of age! Furthermore, the Sword Spirit of the Nine Tribulations Sword now resided within his Dantian, the energy center of his body! From that very moment, Chu Yang would then begin to right all of his past regrets, and carve his very own legend by fulfilling his destiny as the final Master of the Nine Tribulations Sword, and defeating the Heavenly Devils beyond the realm of the Nine Heavens Continent.

With five strikes of his axe, Emperor Yu split the mountains and unified everyone beneath the heavens. He partitioned the land into nine prefectures and erected the nine cauldrons. After Emperor Yu's death, incessant disputes arose within the Land of the Nine Prefectures. One thousand years later, a once-in-a-generation genius—the Heavenly Emperor of Qin Mountains—emerged from out of nowhere. With a strike of his palm, he was able to stop the motion of the 100-meter wide Yan River. With his peerless martial prowess, the Heavenly Emperor of Qin Mountains was ultimately able to unite the land beneath the heavens. However, when he died, chaos once again shrouded the Land of the Nine Prefectures. Several thousand years passed by, and still, no one was able to consolidate the nation. Then the Grandmaster of the Xing Yi Martial Art—Teng Qingshan—arrived here unexpectedly from the modern world.

You should know how it goes, I died, met a ROB, got some wishes, before getting reincarnated in a world of my choosing. Let's get started shall we? ----- In case you didn't realise, this is a Tensura Slime fanfic. I don't consider myself a veteran writer, so if you have any feedback I would be glad to read them. Don't expect a flawless plot line. I don't mind you guys making a bad review but at least let me know what I did wrong. I own nothing except my own characters. The cover pic is something I found off google, if you want me to take it down just drop a comment. https://discord.gg/ephtQTTdxt

Untolerated by heaven, a boy was restricted by the most powerful spell. He accidentally acquired a painting inhabited by nine souls that claimed to be immortal. Then, the legend of a strong young man who violated heavenly principles against the course of nature began.

Su Jie transmigrated to a world of xianxia. He did not have a spirit root and his martial arts talent was average. However, he discovered that he possessed the Spirit Imprint talent. As long as he placed his spirit imprint, be it plant or animal, they would become his clones! When his clones trained, Su Jie himself would benefit. He could easily master a martial arts technique to completion or even the Immortal Martial Artist Plane that surpassed all limits! [Demon Ape Vajra Punch]: By cultivating the Demon Ape Body of Vajra, his body was impenetrable and his strength was unparalleled. He could topple mountains with his Body of Vajra! [Heavenly Silkworm]: The Heavenly Silkworm metamorphosed and broke out of its cocoon to become a butterfly. It transcended life and death, so it was undying and indestructible [Demonic Prana of Dragons and Elephants]: After awakening the Demonic Prana, a divine martial arts technique, his power would be boundless. The sky changed color at his command and he could crush both the heavens and the earth. Not only did Su Jie cultivate martial arts to an unprecedented plane, but even all his clones also became existences that were feared and adored by the world. Demon Ape King, Lord of the Bohai Sea, the World Tree…all of them were his clones. Su Jie declared, “You might still have a chance to survive if you defy the heavens. But you will never get a chance to live if you defy me.”

A mystical presence known as The Flying Dagger brought him, an orphan in his world into the realm of the Nine Astra Skies. Ye Chen is a teenage boy tasked with saving his clan — the Ye Clan — from the complete annihilation by their sworn enemies — the Yun Clan. Join Ye Chen as he embarks on a journey to grow stronger and discover the world in which humans, Beasts and Celestial Beasts coexist with powerful forces that inhabit the world, like Daemon Kings and Divine Beasts.