Science-fiction
Futuristic: books whose plot is based in the future
Space opera
Time travel: books that tell a journey through time
Steampunk
Dystopia
Apocalyptic
Urban fantasy
Paranormal: books with fantasy elements (that are not urban, epic or romance)
Magic: books where magic is a heavy player
Epic fantasy
Superhero: books of superheroes
Young adult
New adult
Terror and horror
Gore: books with a little extra in blood and guts
Dark: books that show the worst of the human nature
Mystery
Adventure
Historical
Regency: books about nobles from the Regency period
Contemporary
Romance (in general)
Contemporary romance
Sci-Fi romance
Romantic suspense
Paranormal romance
Historical romance
Erotica
Ménage: romance and erotica books with group sex
BDSM: books that disply BDSM practices
Rape: books where a rape takes place
M/M: books that tell a love or sex relationship among men
Friends to lover: romance books with friends falling in love
Enemies to lovers: books with enemies falling in love
Second chance: romance books were the main couple is taking another shot
Age gap: books (usually romance) where the age difference of the main characters is important for one or both of them
Warriors: books (usually romance) featuring warriors
Pirates: books (usually romance) featuring pirates
Highlanders: books (usually romance) featuring highlanders
Angels: books (usually romance) featuring angels
Demons: books (usually romance) featuring demons
Vampires: books (usually romance) featuring vampires
Shifters: books (usually romance) featuring werewolves, weretigers, werebears…
Aliens: books (usually romance) featuring aliens
Cyborgs: books (usually romance) featuring cyborgs or enhanced humans
Sports: books (usually romance) featuring athletes
Students: books (usually romance) featuring college or high school students
Soldiers: books (usually romance) featuring soldiers
Rockers: books (usually romance) featuring rock stars or similar
Racers: books (usually romance) featuring professional racers
Bikers: books (usually romance) featuring bikers
Fighters: books (usually romance) featuring professional fighters
Bodyguards: books (usually romance) featuring bodyguards
Firefighters: books (usually romance) featuring firefighters
Detectives: books (usually romance) featuring cops or private detectives. Law enforcement in general
Doctors: books (usually romance) featuring doctors, nurses, paramedics or similar
Thieves | Con artists: books (usually romance) featuring thieves or con artists
Cowboys: books (usually romance) featuring cowboys
Billionaires: books (usually romance) featuring billionaires
Royals: books (usually romance) featuring members of a royal family
Bad boy: romance books featuring the classic bad boy
Ex-con: books (usually romance) featuring an ex-convict
Murderer: books (usually romance) featuring a murderer or psycopath
Mafia: books (usually romance) featuring mobsters and mafia-related characters
Escort: books (usually romance) featuring an escort
Stepbrother: romance and erotica books where the love interest is among stepbrothers
Single parent: books where one of the main characters is a single parent
Widow: romance and erotica books where one of the main characters is a widow
Anthology
Scary: any book that makes me feel fear
First person: books written in first person
Nerd: most likely only suitable for nerds
Giveaway: book I won in a giveaway (which means I didn’t pick it)
Free: book that was free in Amazon when I bought it. This usually means that I only looked at the price tag, so… anything could happen
ARC: copy of the book given freely by the publisher or author in exchange of an honest review
Gold star: book that will always have a special place in my shelf
Teach: books that try to teach something while telling a story
Tears: books that make me cry (which is good)
Hot: books with really good love/sex scenes
Sweet: books with sweet moments between the characters
Book boyfriend: romance books with a guy that you would steal for yourself
Frenzy: non-stop action that makes a book better
Funny: books that make me laugh
Boom: books with a shocking twist or painful cliffhanger
Great cover: books with a really good cover (review edition)
zZz: boring books
Weak: books that feel rushed and lazy
Lost: books where I get lost in the plot due to the author’s style
Love?: strong romances that are hard to believe
Incest: just gross
Bad sex: sex scenes that make me uneasy
Angry: books that piss me off
Cliché: books with obvious clichés
Fumes: smoking is gross, so if a book has too much of it, its mark will be lower
Bad cover: books with really bad covers (review edition)
Burn: a bit drastic, but some books don’t deserve my shelf
