O'Connor, Rory. When it is darkest : why people die by suicide and what we can do to prevent it / Rory O'Connor. - London: Vermilion, 2021. - vi, 346 pages ; 22 cm ISBN: 9781785043437 Nat. Bib. No.: GBC133645 bnb Nat. Bib. Agency Control No.: 020121139 Uk Subjects--Topical Terms: Suicide