- Patrick Ness. A Monster Calls. Somerville: Walker: Candlewick Press, 2011.
- Richard Mabey. "Meeting the oldest living thing on Earth." The Telegraph. 18 October 2015. 20 August 2020. <https://www.telegraph.co.uk/books/what-to-read/richard-mabey-yew-trees/>.
- Thomas W. Laqueur. "Beneath the Yew Tree’s Shade." The Paris Review. 31 October 2015. 20 August 2020. <https://www.theparisreview.org/blog/2015/10/31/beneath-the-yew-trees-shade/>.
- Patrick Barkham. "Britain's ancient yews: mystical, magnificent – and unprotected." The Guardian. 28 September 2019. 20 August 2020. <https://www.theguardian.com/environment/2019/sep/28/britain-ancient-yews-mystical-magnificent-and-unprotected>.
- Ashley Cowie. "Brainless Tourists Slaughter 5,000-Year-Old Sacred Scottish Tree." Ancient Origins. 28 May 2019. 20 August 2020. <https://www.ancient-origins.net/news-history-archaeology/fortingall-yew-0011980>.
- Kylie Harrison Mellor. "Ancient yew trees: the UK's oldest yews." Woodland Trust. 22 January 2018. 20 August 2020. <https://www.woodlandtrust.org.uk/blog/2018/01/ancient-yew-trees/>.
A Monster Calls
by Patrick Ness
