The phylum Mollusca is the second largest group of animals and occur in virtually all habitats.Many non-marine molluscs are threatened with more recorded extinctions than all tetrapod vertebrates combined.This two-volume set will provide the first general account of molluscs in decades and will include hundreds of colour figures.General chapters bring together a diverse and extensive literature, while taxon chapters provide overviews of their evolution, phylogeny and classification as well as more specific and detailed coverage of their biology (reproduction, feeding and digestion, excretion, respiration etc.), their long fossil record, and their natural history.