Competition: we've teamed up with author Corinna Dean to give away five copies of her new book Slacklands, a photographic guide to rural British architecture from the 20th century.

Congratulations to the winners! Abdul Rachid Afande in Mozambique, Clémence Rutin in France, George Thompson in Scotland, William Jaulain in Switzerland and Chilli Wilson in England. They all receive a copy of Slacklands

Corinna Dean is a lecturer, curator and founder of the Archive for Rural Contemporary Architecture (ARCA), an open-source online archive and guidebook.

Slacklands is the first publication from ARCA and it explores the history behind forgotten and overlooked British buildings, ranging from places of worship to industrial sites and Cold War relics.

"The intention of my book is to trigger debate and open up perception and dialogue in reevaluating the aesthetic of the British Landscape," she said.

"It will also generate discussion on future uses for these sites, therefore acting as a positive catalyst for Britain’s heritage."

Most of the 35 sites featured in Slacklands have fallen into ruin or disrepair, presenting a candid and bleak picture of Britain's industrial heritage.

The 144-page book contains full colour photographs and a foreword by British fashion designer Margaret Howell.

Slacklands is available now for £18.95 and is distributed by ARCA.

This competition is now closed. Five winners will be selected at random and notified by email. Winners' names will be published in a future edition of our Dezeen Mail newsletter and at the top of this page. Dezeen competitions are international and entries are accepted from readers in any country.