What is the main theme of the 'A Dog's Purpose' novel series?

English is not my first language so please take care of me and if you find mistakes in it tell me I fix it as soon as possible. Max Winchester died due to an "accident" while reading the novel after his death he meet God who allowed him to travel through and do whatever he think best but on condition to make Protagonist's life miserable. He also gives him the strongest system [Netori system] that help him steal Protagonists Woman, Chances, Luck, etc Why does God want to make that Protagonist's life miserable? And why [Netori system] given to the max let's find out. (English will get better after chapter 38.) I don't own a book cover, I find it online, If creator wants me to change it just message me, I will remove it.

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[ Discord: name : Merciless Clan lien: https://discord.com/invite/2m7XzWyEDQ] In this unique twist on the typical hero-villain dynamic, our protagonist, the villain, finds himself compelled to save humanity from powerful races threatening its existence. Meanwhile, the hero is preoccupied with gathering a harem. The story unfolds as the villain must not only confront external threats but also challenge so-called heroes, proving his perspective and ultimately taking on their responsibilities to ensure humanity's survival. As alliances shift and moral complexities emerge, the narrative explores the unexpected journey of redemption and sacrifice.

Just because you can’t explain it, doesn’t make it a miracle. Something like that happened to Aaron, an introverted youth, who expected to live a normal, boring life. But it took a little for the expectation to go wrong. Who knew he would transmigrate into his favourite Web novel, Forbidden Realms?

Cheng Sheng is a cultivator, but his cultivation is stuck in a low level. Aside from that, his personality is not good, and so people call him 'scum'. When an incident about a strange corpse happened, a big disaster will ensue. Not only to the Xinfanxian sect, not only to the citizens of Xinfaxian, but to the whole world. The demonic cultivators' plot stemming from the past, powers awakening which is connected to his real identity, and a big secret that will shake the world's foundation. Cheng Sheng: I'm just a humble talented genius. Everyone: your words and actions aren't humble at all! Decade-long pining and doting gong x scum shou, together with their friends and family to color their life... join them in their misadventures! Alternative title: The Scum's Series of Unfortunate Events Update: daily

A happy and fulfilled life, everyone wanted that. Rio was no exception, he too wanted to feel joy and fulfillment. But how many actually achieved that? He didn't know, but he knew that he was not part of those. Rio, a part time editor of a webnovel called, The Last Stand, transmigrated inside the world of the novel. Not as a main character, nor as a villain, not even a student. But as a professor. A simple extra, professor that was never even mentioned in the story. Through some circumstances, he was the mentor of the main cast of characters. Armed with knowledge of the future, treasures of the world, and skills of different origins. He would raise these students to their utmost as early as possible. He felt that there would be no problem. However, as time marches forward he realizes everything was not as simple as he thought. The plot, or the future, as he knew it was going further down the rails. The body he occupied had a mysterious identity. A higher existence watches over him. Realizing the implications, he gave up on staying low key and unknown. He will strive, live, and survive admist this world of cruelty. A world set in a modern futuristic setting where cults roam free, capitalism corruption rises, demons and other races exist. However, even if he survived and lived, will he even feel happinness and fulfillment? He didn't know, but he will live still. — The MC in this story might feel light hearted at first, but as the story progresses he will become more darker. The characters might seem like gary stuish, but don't worry there are plenty of reasons for that. The story does not just focus on demons, but more so on other humans. I have no plans to make this a harem story, and usual super MC. Romance is bleak, I, so far, have no intention on making a lovey dovey scene. Expect daily updates, as I upload a chapter per day. — The cover art is not mine, if the artist has any intent or wishes to take it down please inform me immediately and proper action will take effect. (Undergoing EXTENSIVE EDITING rn)