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- RA The Book Vol 2
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- Rabbits in the Wild!
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- Raccoon Gangs, Pigeons Gone Bad, and Other Animal Adventures
- Raccoons
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- Raciocínio Lógico em Exercícios 2ª Edição
- Raciocínio Lógico Para Concursos
- Raciocínio Lógico para Provas e Concursos – 3ª edição
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- Radiación y materia en astrofísica
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- Radiation and the International Space Station
- Radiation Buddies
- Radiation Dose Reconstruction for Epidemiologic Uses
- Radiation Hazards to Crews of Interplanetary Missions:
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- Radiative Forcing of Climate Change
- Radiative Transfer
- Radiação
- Radicais livres
- Radical
- Radical Evolution
- Radical Innovators
- Radical Joy for Hard Times
- Radical Ritual
- Radicals
- Radici e Rami
- Radiestesia
- Radio Propagation and Antennas