The Kings of Castle: Similar romance series

Four Horsemen

by Sarah Bailey

4.12 · 74 ratings

adult · polyamory · retellings · dark · new-adult · mystery · fiction · crime · alpha-mc · friends-to-lovers · boss-employee · contemporary · multi-pov · billionaire · enemies-to-lovers · suspense · book · steamy · reverse-harem · organized-crime

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Death by Daybreak MC

by C.M. Stunich

4.36 · 50 ratings

age-gap · crime · fiction · dark · new-adult · biker · polyamory · adult · romance · organized-crime · steamy · book · reverse-harem · suspense · contemporary · alpha-mc · action-adventure · military · abuse · enemies-to-lovers

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Saint and Sinners

by Ruby Vincent

4.29 · 62 ratings

new-adult · reverse-harem · book · steamy · organized-crime · forced-proximity · romance · alpha-mc · contemporary · audiobook · enemies-to-lovers · suspense · fiction · cruel-mc · action-adventure · mystery · female-mc · crime · adult · polyamory

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The Triad

by Dana Isaly

3.80 · 46 ratings

dark · polyamory · adult · crime · fiction · enemies-to-lovers · contemporary · organized-crime · romance · book · steamy · reverse-harem · new-adult · action-adventure · insta-love · bdsm · outlaws · female-mc · mystery · suspense

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Black Rose Kisses

by Eva Ashwood

4.25 · 69 ratings

crime · audiobook · contemporary · organized-crime · romance · book · reverse-harem · polyamory · adult · dark · new-adult · fiction · fighter · suspense · enemies-to-lovers · psychological · sports · female-mc · mystery · university

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A Court of Gilt and Shadow

by Stacy Jones

4.20 · 40 ratings

fantasy · fiction · fated-mates · polyamory · adult · magic · dark · new-adult · supernatural · fae · royalty · romance · book · reverse-harem · shapeshifters · paranormal · monsters · crime · dark-fantasy · demons

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Mafia Ménage Trilogy

by Julia Sykes

3.94 · 36 ratings

crime · polyamory · reverse-harem · alpha-mc · steamy · adult · suspense · dark · new-adult · fiction · organized-crime · romance · book · kidnapping · contemporary · action-adventure · gothic · multi-pov · realistic · audiobook

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Depraved Sinners

by Sheridan Anne

4.35 · 34 ratings

crime · fiction · adult · polyamory · book · reverse-harem · organized-crime · romance · suspense · family · mystery · cruel-mc · female-mc · dark · new-adult · kidnapping · psychological · steamy · abuse · enemies-to-lovers

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Stonehurst Prep Elite

by Steffanie Holmes

4.18 · 34 ratings

cruel-mc · suspense · contemporary · organized-crime · romance · reverse-harem · book · steamy · dark · new-adult · high-school · polyamory · adult · crime · fiction · enemies-to-lovers · disability · plot-twist · blackmail · anti-hero

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Dolls and Douchebags

by Madeline Fay

4.28 · 45 ratings

polyamory · steamy · high-school · cruel-mc · fiction · crime · contemporary · enemies-to-lovers · mlm · romance · organized-crime · book · reverse-harem · sexual-assault · adult · dark · new-adult · poc-mc · sad · suspense

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Black Creek

by R.A. Smyth

4.43 · 56 ratings

dark · new-adult · polyamory · adult · crime · fiction · suspense · enemies-to-lovers · contemporary · organized-crime · romance · reverse-harem · book · mlm · justice · female-mc · vigilante · multi-pov · steamy · gothic

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82 Street Vandals

by Heather Long

4.48 · 108 ratings

fiction · polyamory · adult · romance · book · reverse-harem · contemporary · dark · new-adult · crime · abuse · age-gap · enemies-to-lovers · organized-crime · steamy · kidnapping · mystery · suspense · multi-pov · audiobook

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Kiss Her Goodbye

by Rebecca Royce

4.28 · 32 ratings

age-gap · organized-crime · crime · reverse-harem · book · romance · fiction · dark · new-adult · contemporary · polyamory · adult · steamy · suspense · enemies-to-lovers · billionaire · audiobook · death · harem · abuse

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Lapland Underground

by Holly Bloom

4.13 · 32 ratings

adult · romance · organized-crime · polyamory · dark · new-adult · fiction · vigilante · urban · crime · justice · contemporary · enemies-to-lovers · suspense · reverse-harem · book · steamy · noir · graphic-violence · action-adventure

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The Royals of Forsyth University

by Angel Lawson

4.28 · 125 ratings

romance · reverse-harem · book · dark · polyamory · university · fiction · steamy · new-adult · contemporary · adult · cruel-mc · organized-crime · crime · suspense · enemies-to-lovers · sports · alpha-mc · abuse · sexual-assault

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The Night Skulls MC

by N.J. Adel

3.38 · 40 ratings

biker · organized-crime · romance · book · kidnapping · contemporary · fiction · crime · dark · reverse-harem · steamy · suspense · action-adventure · polyamory · sexual-assault · adult · new-adult · enemies-to-lovers · love-triangle · urban

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The Black Hand

by C.M. Wondrak

4.10 · 40 ratings

age-gap · alpha-mc · adult · polyamory · contemporary · dark · new-adult · fiction · female-mc · book · reverse-harem · crime · organized-crime · romance · multi-pov · enemies-to-lovers · steamy · suspense · mystery · revenge

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Abbs Valley

by Ames Mills

4.50 · 40 ratings

organized-crime · steamy · reverse-harem · mlm · fiction · new-adult · dark · contemporary · multi-pov · polyamory · adult · romance · crime · book · womens-fiction · mystery · suspense · children · romantic-love · stalking

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Harrow Creek Hawks

by Tracy Lorraine

4.45 · 40 ratings

steamy · book · polyamory · adult · dark · new-adult · fiction · crime · contemporary · forced-proximity · suspense · enemies-to-lovers · abuse · romance · reverse-harem · mystery · anti-hero · alpha-mc · organized-crime · mental-illness

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Twisted Legends Collection

by Alexandra Silva

4.00 · 56 ratings

fiction · dark · adult · romance · book · steamy · crime · fantasy · retellings · organized-crime · reverse-harem · supernatural · paranormal · monsters · new-adult · horror · polyamory · gothic · suspense · contemporary

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Midpark High

by Candace Wondrak

4.30 · 20 ratings

dark · new-adult · high-school · polyamory · fiction · cruel-mc · mystery · suspense · enemies-to-lovers · contemporary · multi-pov · romance · reverse-harem · book · adult · bullying · crime · organized-crime · steamy · revenge

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Kings of Bolten

by K.G. Reuss

4.30 · 37 ratings

reverse-harem · book · romance · new-adult · polyamory · fiction · contemporary · dark · enemies-to-lovers · suspense · steamy · organized-crime · crime · university · alpha-mc · kidnapping · young-adult · boarding-school · mlm · abuse

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