As part of Radio 4's Day of the Scientist Harriett Gilbert asks two scientists and broadcasters to choose a book on a science theme. Adam Rutherford chooses Kazuo Ishiguro's dystopian love story Never Let Me Go. Dr Farrah Jarral says when she first read the novella she has chosen - Octavia Butler's Bloodchild - it blew her mind dealing as it does with interspecies procreation and with underlying themes of control and power imbalance.

Producer: Maggie Ayre for BBC Audio, Bristol