How Does '400 Days' Compare To Other Survival Novels?

An apocalypse driven by natural disasters. Survival of the fittest. Typhoons, floods, deadly cold, scorching heat, earthquakes, tsunamis, insect plagues, acid rain… After struggling through three years of the apocalypse, Nicole Floyd met a brutal death. Miraculously, she woke up and found herself three days before it all began. Nicole seized the advantage to reclaim her storage space, flipping the switch on full-on stockpiling mode. She shopped until she ran out of money, and her storage was packed tight. She also looked for the dog that had saved her life once before. She sharpened her knives, stacked her supplies, and took care of unfinished business. She paid back every debt, whether owed in blood or in kindness. And then, disaster struck. Her right hand gripping a knife and her left stroking the dog, Nicole pressed on through the ruins of a world without order or morals.

The world plunged into a new Ice Age. As the frozen apocalypse spread, 95% of humanity perished. In his first timeline, Cyrus Knovell's kindness cost him everything. The people he had helped betrayed him and left him for dead. Fate, however, granted him a second chance. He awakened one month before the world froze, gaining a dimensional ability that let him store anything without limit. Now he hoarded supplies by the billions and built a fortress no one could breach. While others shivered, starved, and traded their dignity for a morsel, Cyrus lived in comfort. The desperate came begging. The manipulative vixen: "Cyrus, let me into your shelter, and I'll be your girlfriend, okay?" The spoiled rich heir: "Cyrus, I'll give you all my money for just one meal!" The greedy neighbors: "Cyrus, you shouldn't be so selfish. You should share your supplies with us!" Cyrus remembered their betrayals. Lounging in his steel fortress and savoring his private paradise, he sneered, "Your survival has nothing to do with me. I'd rather feed the dogs than feed you."

I woke up in Vegas married to my incredibly hot stalker. To make matters worse, he’s convinced we’re soulmates. Marcellus Gregory has spent years quietly inserting himself into my life, infuriating me at every turn. Now he wants one hundred days to prove our marriage isn’t a mistake. One hundred days. Then I’m filing for divorce. Pretty simple. Until someone starts turning my life into a nightmare. Strange things happen when no one else is around. Secrets from my husband’s past refuse to stay buried. And the closer I get to exposing his lies… the more I begin to question what’s real. Some love stories begin with attraction. Ours begins with secrets and maddening lust. … This is the spin-off for Married To My Billionaire Nemesis. TW: Contains mature content and dark psychological themes.

After I was caught in a dockside explosion, I was bound to a Survival Program. It gave me twenty-five years and four designated targets. If even one target’s Love Score or bond score reached 100%, I could wake up in my real world. But I failed all four. Because every target I tried to reach eventually turned toward Sophia Lane, the heroine of this world. They called my pain a performance. They called my tears manipulation. They said I was only pretending to break down so they would choose me over Sophia. But if they never loved me, why did they lose control when my mission failed and I chose to leave this world for good?

“One hundred days to save my brother. One hundred days to survive a monster.” Maya Rivers is drowning. With her twelve-year-old brother’s life hanging by a thread and hospital bills she can’t pay, she is forced to make a deal with the devil. For $10 million, she agrees to a 100-day marriage contract with Ethan Wellington, the cold, volatile heir to a massive empire. Her mission? To bring back the "good man" Ethan once was before tragedy shattered his soul. But Ethan is a living nightmare. Consumed by rage and convinced his grandfather is responsible for the accident that killed his family, he has turned his back on the world. The only person he trusts is his Uncle Marcus—everyone else is just a target for his cruelty. Now, Maya must survive 100 days in a house filled with secrets and spite. But in a game where the rules are written in blood, will she tame the devil... or be consumed by his darkness?

Willa Roane dies the same night she catches her boyfriend in bed with her sister. Instead of waking in peace, she’s dragged onto a ghostly bus and informed—by a mocking intercom—that she’s entered the Survival Game: a twisted show where the dead are thrown into lethal, terrifying worlds for the cruel amusement of an unseen audience. The rule is simple: survive each round… or your soul is erased forever. Her only ally is Corvin Thorne, the devastatingly beautiful stranger who yanked her off the road and onto the bus. A hybrid vampire–werewolf with a past soaked in blood, Corvin is bound by a wicked secret contract to keep Willa alive… or forfeit his own soul to the game. As they descend deeper into the nightmare realms—from a monster-ruled Dracula Castle to ruined neon cities—Willa realizes she is the key. The deadly worlds are twisting around her darkest fears and fantasies, turning her own horror stories into elaborate traps. She isn’t just a player; she’s the author of the chaos. And the man sworn to protect her may be the only thing she can’t control. Now Willa must rely on the dangerous man she’s falling for, a man who swore he would never love again. The heat between them is undeniable, but as their bond deepens, it’s impossible to tell which is more dangerous: the monsters hunting them… or the love that could destroy them both. Love might be beautiful—but in this game, it’s never sweet. It’s a weapon, a weakness, and the one thing that might rewrite the rules of Hell itself: desire. ---