- Second Stringers: The Sole Advantage of Power
- Second Succubus
- Second Summers
- Second Sunrise
- Second Thoughts: More Queer and Weird Stories
- Second Time Around
- Second Time's A Curse
- Second to None
- Second to Surrender
- Second Variety
- Second Visit
- Second Wave: A Trip to the Zoo
- Second Wave: Rise of the ShadowKin
- Second Wind: Stranger Than Fiction, Book 4
- Second Year Setbacks
- Second, Ambitions
- Second-Hand Princess
- Seconda giustificazione: la macchina
- Seconde Humanité
- Seconde Patrie – suivi d'annexes
- Seconde Vie
- Secondhand Shadow
- Secondhand Souls
- Secondhand Spirits
- Secret
- Secret Agent Man
- Secret Agents Codename
- Secret Bloodline
- Secret de l'épée
- Secret Desire
- Secret Desires : Shifter Menage Romance Collection
- Secret Diary Of A Young Succubus
- Secret Dreamer
- Secret du 16 V (Le)
- Secret Frontier
- Secret Gardens
- Secret Heart
- Secret Identity
- Secret Insurrection: Stories from a Novel of a Future Time
- Secret Intentions: When Ghosts Scream For You To Run...
- Secret Island
- Secret Island - A New Dawn
- Secret Jaguar
- SECRET KNIGHT: CONSPIRACY: Arthurian Saga Series Book 1
- Secret Legacy
- Secret Liaison
- Secret Lives of Books
- Secret Magic
- Secret Magic in Small Places
- Secret Mammal's Business
- Secret Matter
- Secret Mayday
- Secret McQueen Books 1-4
- Secret McQueen Books 5-8
- Secret Mystic Island
- Secret of Bog Lane
- Secret of Haunted Bog
- Secret of Life
- Secret Of Man In Black
- Secret of Pax Tharkas
- Secret of the Dragon
- Secret of the Dragon's Breath
- Secret of the Dragon's Claw
- Secret of the Dragon's Eye
- Secret of the Dragon's Scales
- Secret of the Dragon's Teeth
- Secret of the Gargoyles
- Secret of the Godforsaken
- Secret of the Haunted Hotel
- Secret of the Immortals
- Secret of the Laurel Crown
- Secret of the Marauder Satellite
- Secret of the Mine: A Minecraft Adventure Book
- Secret of the Phoon
- Secret of The Red Planet
- Secret of the Red Spot
- Secret of the Sands
- Secret of the Sixth Magic, 2nd Edition
- Secret Of The Skulls
- Secret of the Stars
- Secret of the Vettigs
- Secret of the Weeping Lady
- Secret of the Wolf
- Secret Ones
- Secret Ones Volume 1
- Secret Ones Volume 2
- Secret Order of the Overworld
- Secret Panorama
- Secret Passage
- Secret Peace Corp Planet Ares Driftwood Eagle
- Secret Peace Corp Planet Ares Yellow Cake
- Secret Prince's Bride
- Secret Rich Lesbian
- Secret Scorpio [Dray Prescot #15]
- Secret Self (VBI #3)
- Secret Seller: A Prequel to The Famine Cycle
- Secret Sky
- Secret Souls
- Secret Spirit Guardians of Santa Fe
- Secret Strike
- Secret Supers
- Secret Tales of the American Wealthy
- Secret Under Antarctica
- Secret Under the Caribbean
- Secret Under the Sea
- Secret Unleashed
- Secret Way to Produce Special Concrete for the Great Pyramids
- Secret Weapon
- Secret Wedding: BWWM
- Secret Whispers
- Secret's Sanctum
- Secreto azteca
- Secreto de la Espada
- Secretos De Confesión Y Algo Más
- Secretos De Los Árboles
- Secretos del mar y de la muerte
- Secretos Mágicos
- Secretos perdidos en Allasneda
- Secrets
- Secrets and Adventures
- Secrets and Lies
- Secrets and Spellcraft
- Secrets at Echowood College
- Secrets at Midnight
- Secrets Beyond Best Friends - Cherry Blossoms (Book 1) Contemporary Romance
- Secrets Beyond Best Friends - Daises (Book 3) Contemporary Romance
- Secrets Beyond Best Friends - The Complete Series Contemporary Romance
- Secrets Beyond Best Friends - Withering Without You (Book 2) Contemporary Romance
- Secrets Brought to Light