Jax A. River: Complete Author Guide

Jax A. River writes LitRPG in which the stat panel is a moral instrument. Twenty-one titles on the site, three complete series, two new series openers and two standalones, and one recurring move: the System offers a clean answer — a throne, a restored body, administrator access, a command to bite — and the protagonist refuses it, and the refusal is where the level-up lives. This is harem LitRPG, ecchi isekai, gender-bender progression fantasy and weird-western portal fantasy, written in close third person with stat rows, boss phases, hostage health bars and consent gates as literal game mechanics.

The house style

Every Jax book runs on a System with visible panels — HP and MP rows, class evolutions, named skills, capstone unlocks — and every boss fight has a mechanic that is also an argument. Harems are households: the women are partnered with each other on the page, F/F is real rather than staged, and the group has no head. Villains own things — souls, collars, liens, marks, children — and the finales are won by separating love from ownership rather than by out-damaging the boss. The dogs are people. The tone runs from gym-bro comedy to cosmic horror, sometimes inside one chapter.

Who will love this shelf

Readers of harem LitRPG who want the harem to be affectionate rather than competitive; isekai readers who like the protagonist to keep their identity under pressure; dungeon-crawl and raid-fiction readers who want boss mechanics that reward thinking; and readers who want a series to actually end — three of the four multi-book runs close with epilogues and babies. Readers who want a power fantasy, a competitive harem, or a protagonist who eventually just gets strong should look elsewhere: Chad finishes four books at Force 7.

Heat, across the pen

Site heat level: Open door on the three finished harem series. Hell Raid Harem and Chad’s Cursed Build are ecchi with moderate on-page sex and spoken-yes gates. Angel Queen’s Mercy Route is moderate; its Tyrant Route is explicit and dark, with coercion written as violation; the shared finale is explicit and frequent with negotiated consent at its centre. The Dog at Bone Orchard and Manifest Destiny are not romances, and neither is I Ate the Tutorial Boss. My F-Tier Summons Keep Dying for Me is Explicit.

The series

Hell Raid Harem — complete, 4 books

A demon marquis kills Cal Knox’s dog and Cal follows it into Hell with a forbidden class. Each book raids a different afterlife — Hell, Heaven, the Sea of Souls, a god’s Cradle — with an angel, a succubus, a resurrected Halo Hellhound named Biscuit and, by Book 4, four children. The finale separates the words LOVE and OWNERSHIP with a dog’s teeth. Start with Hell Took My Dog.

Chad’s Cursed Build — complete, 4 books

A bodybuilder dies mid-set and wakes in a woman’s body with a life-stealing tank build; the kingdom’s chosen heroes run a soul economy, and Chad’s Blood Mark can target an ownership network as one hostile. Slave revolt, propaganda war, imperial succession, a Country Health bar of eighteen million — and three villains each offering his original body back. Start with Nice Body, Wrong Loadout.

Angel Queen — complete, 9 books (two routes + shared finale)

Trevor Dwyer, nineteen and dead, is reissued as Heaven’s cutest angel. The Mercy Route (4 books) has him accidentally start a church and end by saving Heaven without taking the throne; the Tyrant Route (4 books) has him deliberately start a cult and take the throne and everything in it. Book 5 is shared: the two Trevors meet, fuse, and fight the First Mouth. Start with Accidentally Started a Church or Deliberately Started a Cult, depending on which Trevor you want.

New series openers

• My F-Tier Summons Keep Dying for Me — LitRPG cultivation harem: a dead gamer from Texas gets a cursed summoner class that only binds people and only breaks through when they die. An archangel, a succubus and a witch, suppressed to his F-minus realm; a thirty-one-hour recall; a watcher in the water that feeds on his refusals. Explicit, and the grimmest book on the shelf. Full guide.
• I Ate the Tutorial Boss — monster-protagonist dark comedy LitRPG: a shapeshifting thing with a new body walks into a dungeon that registers people as property and is adopted by a six-year-old Wayfinder. Eat-to-learn build, a boss whose bodies respawn, no romance for the lead. Full guide.

Serials and the collected books

Jax also publishes chapter by chapter: Warden of County Zero, All Hail the Apocalypse Dragon, Lonely Catgirls Near You, The Trestle Build and the illustrated caveman comedy Unga Bunga!!!. Links to each serial are on the author page. Lonely Catgirls Near You, a spice-heavy episodic harem LitRPG about a guild “Dungeon Boyfriend” and the catgirls who book him, is also being collected into ten books in ebook and paperback, one a week from October 27 to December 29, 2026; the schedule is on its series page.

The standalones

• The Dog at Bone Orchard — reverse-isekai weird western: a swordsman from the wrong side of a door walks into 1883 West Texas with a dog and a job, finds a vampire bounty hunter, a cattle baron running branded debtors under the stockyards, and oath magic that levels by promises kept. No harem.
• Manifest Destiny: A Texan Crusade — portal-apocalypse kingdom builder (The Planar Republic, Book 1): Texas is transported wholesale, the System arrives, and one stubborn man and his dog build a republic one mile of road at a time. Settlement building, class selection, found family of survivors. No romance.

Where to start, by mood

• Harem dungeon raid with a dog you will cry over: Hell Took My Dog
• Gender-bender comedy with a slave revolt underneath: Nice Body, Wrong Loadout
• Villain protagonist you are not supposed to forgive: I Became an Angel and Deliberately Started a Cult
• Consent-forward harem where the hero gives power away: I Saved Heaven Without Taking the Throne
• No harem, just a man, a dog and a frontier: The Dog at Bone Orchard or Manifest Destiny

Where it sits

Author page: Jax A. River. The house’s other LitRPG titles are Lady Heartswell’s Crimson Vows of Tartarus and The Third Ascension (LitRPG romance) and Morgan Cipher’s The Final Boss Is One of Us (LitRPG thriller, no romance). Genre primer: The Centuria Guide to LitRPG.

Reader Questions

Author page: Jax A. River. Browse the full catalogue at Centuria Books.