This 9000 page Encyclopedia includes the following volumes:

Grzimek Animal Life Encyclopedia Volume 1 Lower Metazoans Lesser Deuterostomes  
Grzimek Animal Life Encyclopedia Volume 2 Protostomes                           
Grzimek Animal Life Encyclopedia Volume 3 Insects                               
Grzimek Animal Life Encyclopedia Volume 4 Fishes I                              
Grzimek Animal Life Encyclopedia Volume 5 Fishes II                             
Grzimek Animal Life Encyclopedia Volume 6 Amphibians                            
Grzimek Animal Life Encyclopedia Volume 7 Reptiles                              
Grzimek Animal Life Encyclopedia Volume 8 Birds I                               
Grzimek Animal Life Encyclopedia Volume 9 Birds II 
Grzimek Animal Life Encyclopedia Volume 10 Birds III                            
Grzimek Animal Life Encyclopedia Volume 11 Birds IV                             
Grzimek Animal Life Encyclopedia Volume 12 Mammals I                            
Grzimek Animal Life Encyclopedia Volume 13 Mammals II                           
Grzimek Animal Life Encyclopedia Volume 14 Mammals III                          
Grzimek Animal Life Encyclopedia Volume 15 Mammals IV                           
Grzimek Animal Life Encyclopedia Volume 16 Mammals V                            
Grzimek Animal Life Encyclopedia Volume 17 Cumulative Index

Format: PDF 
http://www.amazon.com/Grzimeks-Animal-Life-Encyclopedia-Encyclopeida/dp/0787653624

9000 pages
Publisher: Gale Cengage; 2 Sub Edition
Language: English

This book is clearly the best zoological compilation that is available at the moment. Grzimek is one of the most renowned zoologists in the world, and his works were edited and supplied with material by today's highest-ranking zoologists. 

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