Field Guide to the Ladybirds of Britain and IrelandHelen E. Roy, Richard Lewington, Peter M. J. Brown · First published 2018Open the Tome
Field Guide to the Ladybirds of Great Britain and IrelandHelen E. Roy, Peter M. J. Brown · First published 2018Open the Tome
Natural History of Ladybird BeetlesMichael Majerus, Helen E. Roy, Peter M. J. Brown · First published 2016Open the Tome
Field Guide to Invasive Plants and Animals in BritainOlaf Booy, Max Wade, Helen E. Roy · First published 2015Open the Tome
Invasive Plants and Animals of Britain Helm Field GuidesHelen E. Roy · First published 2014Open the Tome
Invasive Alien Arthropod Predators and ParasitoidsHelen E. Roy, Patrick De Clercq, Lori-Jayne Lawson Handley, John J. Sloggett, Remy L. Poland, Eric Wajnberg · First published 2013Science FictionOpen the Tome
LadybirdsHelen E. Roy, Peter M. J. Brown, Richard F. Comont, Remy L. Poland, John J. Sloggett · First published 2013Open the Tome
Invasive Alien Arthropod Predators And Parasitoids An Ecological ApproachHelen E. Roy · First published 2011Science FictionOpen the Tome
Guide to Ladybirds of the British IslesM.E.N. Majerus, Helen E. Roy, Peter M. J. Brown, Remy Ware · First published 2006Open the Tome
