My Ten Wives and Ten Rings in the Apocalypse - Chapter 110 Fourth Circle Existence

A scientific genius named Thomas Harrier was transmigrated to an imperial prince body after a car accident that took his life. He found out that he is in a world similar to our own with a timeline akin to early twentieth century. The body that he is occupying was the imperial prince of a failing empire who suddenly rose to power after a successful assassination attempt of his father. Unaware that the attack is just the beginning of what is to come. He faces many challenges throughout. Will Thomas Harrier be able to live his second life in peace while running an empire and getting it back to its former glory? Or will he succumb into a conspiracy lurking within the country's borders?

Expect some:

Cold war era techs.

Super battleship with advanced electronics, propulsion, and fire control systems?
Helicopters?
Missiles?
Modern medicines and equipment?
AC-130?
A nuke?
Challenger or Abrams or Leopard?
F-4 Phantom or MIG-21?
Colored TV's.

Everything!!!

PS. Cover not mine, I just found it on google.

In the far future humanity is threatened by monstrous beings called kaiju now humans have expanded across the galaxy with the development of new techniques and fleets of mechs.Alto a young boy with dreams of becoming a great mech pilot is forced to be a mech designer. He finds a strange technology that opens his eyes to the vast secrets of the galaxy, now with a new purpose Alto must become something the world has never seen before.A/N: Just wanna do a good sci-fi book

Lucinda Perry, a social recluse and a workaholic, makes a pledge to herself to go all wild on her twenty-fifth birthday and even score a one night stand if she gets her long deserved promotion at work. Few days to her twenty-fifth birthday, she gets promoted to not just a higher position but to the head office in a different city.

Having to spend her birthday night in a new city, she goes to the club where she meets a very handsome stranger, Thomas Hank, who offers to be her one night stand after catching a glimpse of her dare-to-do list, which included having a one night stand.

Thomas Hank, after having been used by several ladies in the past, is bent on getting the lady of his dreams who would love him for himself and not his wealth. So when he meets the cute and naive Lucinda Perry at the club, he decides to keep his true identity from her and find out if she was worth keeping.

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***Excerpt***

“What are you doing here?” Lucy asked in alarm when she walked into her boss' office and saw Tom standing by the window,

“Who let you in here? Come with me, you should leave now before he comes in and sees you here. He can be really mean.” Lucy said reaching out to grab his hand, but he made no move to reach for her hand, and just kept staring at her with a slightly amused expression.

“I came to fulfill your fantasy.” Tom said looking into her eyes with an unreadable expression.

“Fantasy? What fantasy?” She asked with a frown as she hurried to the door to shut it so her boss wouldn't walk in on them.

“You've forgotten? You said you would love to have sex with me on your boss' table. I want to make it happen.” Tom said making her heart skip a beat.

“ARE YOU OUT OF YOUR MIND?” She half yelled as she took his hands and tried to drag him to the door, “I could lose my job if my boss finds you in here.” She snapped at him.

“Nevermind about that. Tell me the thought of this doesn't turn you on? I'm here, you're here, and the table is right here. I could have you on your back in a second and you'd be crying out my name...” Before Tom could finish, the office door was pushed open.

“Sup Tom? Can I talk to you for a sec?” Harry asked as he walked in, his eyes on the documents in his hand. He stopped when he raised his head and realized Lucy was in the office. He almost kicked himself when he saw the frown on Lucy's face, “Shit!” Harry muttered, and gave Tom an apologetic glance when he realized he had just screwed up.

“I thought you were going out?” he asked her with an awkward smile.

“Tom? You know him? I mean... other than him being my driver?” She asked both men, looking from one to the other when she noticed Harry didn't look surprised to see Tom in the office.

What was going on here? What was she missing? Lucy asked herself as her gaze shifted from Harry to Tom who was glaring at Harry. There was no way Tom could be her boss, right? All the pieces of the puzzle was beginning to fit now. It was all beginning to make sense now, she thought as she glanced at Tom one more time before walking out of the office.

“Elysia, why are you always subtly asking about how Michael's doing?”“Oh? Do I? Maybe it's because he was the only Herrscher in our era who fought for humanity! He was both the First Herrscher and a human named Michael. Yes! That's definitely it!” Facing Mei's question, Ellie just offered a faint smile.“What about Mobius?”“Tch!” The green-haired little girl snorted dismissively, turning her head away.“Who else?” Mei covered her face.“Pardo?”“W-w-what! Kalpas is clearly very concerned about Boss Michael too!”“Get lost!”“Kevin?”“It's not entirely what you think. He has a much more important meaning to us—a family member we promised to walk towards the future with.”-----True Love Warrior Protagonist, Not very Mental stable Protagonist, Pessimistic Protagonist, Anti-Hero Protagonist, Crybaby Protagonist, Michael x Elysia. Oh, Michael... Don't come here; I'm just writing nonsense.