- Seconds Away (Book Two)
- Seconds Before Sunrise
- Seconds Out
- Secret Academy - Gefährliche Liebe (Band 2)
- Secret Academy - Verborgene Gefühle (Band 1)
- Secret Admirer
- Secret Agent
- Secret Agent Josephine's ABCs
- Secret Agent Josephine's Numbers
- Secret Agent Robot Command
- Secret Ashes
- Secret City
- Secret Clique (Replica #5)
- Secret Coders
- Secret Coders: Monsters & Modules
- Secret Coders: Paths & Portals
- Secret Coders: Potions & Parameters
- Secret Coders: Robots & Repeats
- Secret Coders: Secrets & Sequences
- Secret Diary
- Secret Diary Unlocked
- Secret Diary Unlocked Companion Guide
- Secret Files 3 The Archimedes Code Game Guide & Walkthrough
- Secret Fire 1. Die Entflammten
- Secret Fire 2. Die Entfesselten
- Secret Game. Brichst du die Regeln, brech ich dein Herz (Romantic Suspense meets Dark Academia)
- Secret Holiday
- Secret Horse
- Secret Identity
- Secret Illusions (Salmon Run - Book 4)
- Secret in St. Something
- Secret in the Sand
- Secret Keeper
- Secret Kingdom 1
- Secret Kingdom 10
- Secret Kingdom 11
- Secret Kingdom 12
- Secret Kingdom 2
- Secret Kingdom 3
- Secret Kingdom 4
- Secret Kingdom 5
- Secret Kingdom 6
- Secret Kingdom 7
- Secret Kingdom 8
- Secret Kingdom 9
- Secret Letters From 0 To 10
- Secret Lies
- Secret Neighbor Guide
- Secret of a T-Rex
- Secret of Betrayal
- Secret Of Bradbury Mansion
- Secret of Light
- Secret of Omordion
- Secret of the Azure Stone
- Secret of the Cave
- Secret of the Crystal Dragon
- Secret of the Dragon's Breath
- Secret of the Dragon's Eye
- Secret of the Lake: Book 1
- Secret of the Night Ponies
- Secret of the Red Arrow
- Secret of the Ron Mor Skerry
- Secret of The Saans
- Secret of the Scarab
- Secret of the Sea Dragons
- Secret of the Spa
- Secret of the Stallion
- Secret of the Stone Lion
- Secret of the Stallion
- Secret of the Stone Lion
- Secret of the Storm
- Secret of the Super-small Superstar
- Secret of the Tree
- Secret of the Warlock's Crypt
- Secret Origins
- Secret Paws
- Secret Power for Girls
- Secret Power to Joy, Becoming a Star, and Great Hair Days
- Secret Power to Treasures, Purity, and a Good Complexion
- Secret Power to Winning, Happiness, and a Cool Wardrobe
- Secret Protector, Band 1: Tödliches Spiel
- Secret Protector, Band 2: Mörderische Erpressung
- Secret Protector, Band 3: Bedrohliches Vermächtnis
- Secret Romeo: A Gay Young Adult Romance Story
- Secret Sabotage
- Secret Santa
- Secret Scribbled Notebooks
- Secret Seven Adventure 秘密七の冒険 (ESL/EFL日本語の注釈版)
- Secret Seven Fireworks
- Secret Seven Mystery
- Secret Seven Mystery 秘密七謎の事件 (ESL/EFL日本語の注釈版)
- Secret Seven on the Trail
- Secret Seven on the Trail 秘密七追跡中 (ESL/EFL日本語の注釈版)
- Secret Seven Win Through
- Secret Seven Win Through 秘密七優勝 (ESL/EFL日本語の注釈版)
- Secret Sexting
- Secret Skies
- Secret Sky Garden
- Secret Songs
- Secret Summers
- Secret Survivors