Helen E. Roy

The ladybirds (Coccinellidae) of Britain and Ireland

The Ecology of Fungal Entomopathogens

From biological control to invasion

Invasive Alien Arthropod Predators And Parasitoids An Ecological Approach

Invasive Plants and Animals of Britain Helm Field Guides

Field Guide to the Ladybirds of Great Britain and Ireland

Invasive Alien Arthropod Predators and Parasitoids

Ladybirds

Field Guide to the Ladybirds of Britain and Ireland

Natural History of Ladybird Beetles

Field Guide to Invasive Plants and Animals in Britain

Guide to Ladybirds of the British Isles