Q
| Publisher | Website | ISBN prefix |
| Quest Books | www.questbooks.net | 0-8356 |
| Quick American Archives | www.quickamerican.com | 0-932551, 0-9647946, 1-878125 |
| QuinnEssentials | 1-888358 |
R
| Publisher | Website | ISBN prefix |
| Rat Press | www.ratpress.com | 0-981805 | Regnery Publishing Inc. | www.regnerypublishing.com | 1-59698 | Revolver Books | www.revolver-books.de | 1-905978 |
| Rich Press | 1-9339 | |
| Ripley Entertainment | www.ripleybooks.com | 1-893951 |
| Rodmell Press | www.rodmellpress.com | 0-9627138, 1-930485 |
| Ronin Publishing | www.roninpub.com | 0-914171, 1-57951, 0-915904 |
| Running Press, Running Press Kids, Running Press Miniature Editions/Courage Books | www.perseusbooksgroup.com/runningpress.jsp | 0-7624, 0-89471, 0-914294, 1-5613, 1-88165 |