books by subject
Hydrobiology

Observer's Book of Aircraft (Observer's Pocket S.)

Blue Planet II: A New World of Hidden Depths

Discoveries of the Census of Marine Life: Making Ocean Life Count

The Concise Guide to Seashore Life (Concise guides to the wildlife & plants of Britain & Europe)

The Deep Ocean: Life in the Abyss

Blue Machine: How the Ocean Shapes our World

To Sea and Back: The Heroic Life of the Atlantic Salmon

Lost Ocean: An Inky Adventure & Colouring Book

Sharks of Tropical and Temperate Seas (Nature S.)

Frogs (Worldlife Library)

The Blue Planet

Observing The Countryside and Seashore

Flies for South African Waters: A Waterside Guide to Fly Selection

Killer Whales (Worldlife Library)

Blue Whales (Worldlife Library)

Gem Guide to Pond Life (Collins Gems)

Rivers, Ponds and Lakes (Alpha Books S.)

Fishing: Impossible: Three Fishing Fanatics. Ten Epic Adventures. The TV Tie-in Book to the BBC Worldwide Series with ITV, Set in British Columbia, ... Africa, Scotland, Thailand, Peru and Norway

Key to the British Fresh and Brackish Water Gastropods (Scientific Publications)

Animals of the Surface Film (Naturalists' Handbook): 12 (Naturalists' Handbooks)

Key to the Larvae of the British Ephemeroptera: With Ecological Notes

Shells (Usborne Spotter's Guide)

Eyewitness Quickstart: Shark (DK Eyewitness)

Floodplain Management: A New Approach for a New Era

Collins Gem - Sharks

A World in a Shell: Snail Stories for a Time of Extinctions

Marine Electronic Navigation

PIRATES (B FORMAT)

Metazoa: Animal Minds and the Birth of Consciousness
