Competition: Dezeen has teamed up with publishers Myrdle Court Press to give readers the chance to win books about Trenton Oldfield's time spent behind bars after disrupting the Oxford-Cambridge boat race.

Congratulations to the winners! Jorge Batista from Portugal, Robert Baffour-Awuah from the UK, Joanna Rokowska from Sweden, Min Li Chai from Malaysia and David Briers from Australia all won a copy of Trenton Oldfield's prison diary.

The Queen vs Trenton Oldfield: A Prison Diary was written by Oldfield during his 6 months in prison after jumping into London's River Thames and delaying the annual university boat race between Oxford and Cambridge to protest against elitism.

"Trenton Oldfield was sentenced to six months imprisonment at HM Wormwood Scrubs for a peaceful direct action protest at the Oxford & Cambridge Boat Race," said the publishers. "His aim was to draw attention to the unjust inequalities in British society being severely exacerbated by government cuts and a culture of elitism."

Oldfield's diary is published along with articles considering the architecture of prison buildings and the design of everyday items used by inmates.

The 308-page book includes a visual archive of prison material – from dishes and toiletries, to clothing and paperwork. It also contains a guide to prison resources and a transcript of Oldfield's trial.

The book is available to buy from the Myrtle Court Press website and selected retailers.

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.