| Author | Titles | | 1.
| Ruiz de Samaniego, Alberto, 1966- | 20 | | 2.
| Ruiz del Árbol, Marta | 1 | | 3.
| Ruiz, Diego | 2 | | 4.
| Ruiz, Eulália | 2 | | 5.
| Ruiz, Félix | 1 | | 6.
| Ruiz, Ferran | 5 | | 7.
| Ruiz Ferrandis, Francisco, 1909- | 1 | | 8.
| Ruiz García, Elisa | 3 | | 9.
| Ruiz García, Nuria, 1967- | 1 | | 10.
| Ruiz Gómez, Leticia | 6 |
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