Series starting with R
- Reflections
- Reflections in Natural History
- Reflexiona
- Reform
- Refuge Recovery
- Refuting Evolution
- Regan Merritt
- Regan Merritt Mysteries
- Regan Reilly
- Regan Reilly Mysteries
- Regan Reilly Mystery
- Regencies
- Regency
- Regency Duo
- Regency Faerie Tales
- Regency Flings
- Regency Imposters
- Regency Nobles
- Regency Proper Romance
- Regency Quartet
- Regency Spies
- Regency Valentine
- Regeneration
- Regeneration Trilogy
- Reggie Fortune
- Regional and Other Titles
- Regretting You
- Regular Show
- Reid Family
- Reidsville
- Reidverse
- Reign of Remnants
- Reign of the Seven Spellblades Light Novel
- Reiniciados
- Reiter-Trilogie
- Rejected for Content
- Reject Island
- Rejects Paradise
- Rekke & Vargas
- Relatos completos
- Religion and the Political Order
- Religious Books
- Religious Literacy
- Reluctant Royals
- Reluctant Titles
- Remains
- Remake
- Remembering Isaac
- Remember Me
- Remembrance of Earth's Past
- Remi Fargo
- Remixed Classics
- Remnants of Filth: Yuwu
- Rémy
- Remy Chandler
- Rencontres inattendues
- Rencontres internationales de Genève
- Rendez-vous, an invitation to French
- Renée Ballard
- Renegade Angels
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