- Managing Stress Naturally
- Manatees: Mermaids of the Sea
- Manejo de bosques
- Mangeresti un vegano?
- Mangrove Forests
- Manifest animalista
- Manifeste pour un nouveau contrat social
- Manifesto For a New Natural Order
- Manifesto verde
- Manifiesto animalista
- Mankind in Amnesia
- Manna
- Mannen som planterade träd
- Manual crítico de cultura ambiental
- Manual da casa sustentável
- Manual de osteología de cráneo bovino y equino
- Manual de Plantas y Algas Comestibles LuisGuLo
- Manual do Escoteiro
- Manual of the Grasses of the United States, Volume One
- Manual of the Grasses of the United States, Volume Two
- Manual Para Cães
- Manual veterinario del tapir
- Manual veterinario del tapir
- Manuale Di Conversazione Per Eno-Turisti
- Manuale di iniziazione sciamanica
- Manuel d'identification des bois commerciaux - Tome 1
- Manuel d'identification des bois tropicaux
- Manuel de médecine vétérinaire
- Manuel de sclérochronologie des poissons
- Map for the Heart
- Mapeamento Ambiental Integrado: Práticas em Ecologia da Paisagem
- Maporenda
- Mapping the Zone
- Mar de tormentas
- Marathon: en bok för barn och dårar, lidingölöpare och poeter
- March Was Made of Yarn
- Marcher, une expérience de soi dans le monde
- Marches
- Mare di notte
- Maria ci parla
- MARIAGER FJORD
- Marine Biotechnology in the Twenty-First Century
- Marine Creatures
- Marine Fishes of Florida
- Marine Flatworms of the Tropical Indo-Pacific
- Marine Life of Byron Bay
- Marine Life of the Maldives, 2nd Edition
- Marion and Hungry Mother State Park
- Mark Carwardine's Guide To Whale Watching In Britain And Europe
- Marla
- Marne Rosse
- Marshland Bird ID Videos
- Martial’s Mammals
- Marvels of Pond life
- Mary speaks
- Maryland's Lower Susquehanna River Valley
- Marées noires et politique
- Massachusetts Covered Bridges
- Mastering Minimalism: Eight Steps To A Life Of Less Stuff And More Freedom
- Materia viviente, vida pensante
- Matèria vivent, vida pensant
- MAVİŞ yunus
- MAWIDA
- Max Planck