2027 Forthcoming. Botanical Folklore. Penguin Random House

2026 In Press. Social history of Coca & Cocaine Book. Kew Publishers.

2023 PhD Thesis. RBG Kew | Royal Holloway

2019 Just The Tonic. Kew Publishing

2019 The Herbal Remedy Handbook. Kyle Books

2017 The Handmade Apothecary. Kyle Books

Publications as contributor/Interviewee:

2027 Forthcoming, Quinological queries: The rise of European quinine science in the nineteenth century. How Plants Became Natural Remedies. University of Pittsburgh Press .

2026 Papa and Kuka: A biocultural exploration of two Andean crops Plant Humanities. Bloomsbury.

2025 Plants as Resistance (Chapter, with Kapwani Kiwanga & Miranda Lowe). The Shape of a Circle in the Mind of a Fish. Hatje Cantze.

2022 Bitter barks: legacies and futures of the famous fever tree (Chapter, with Nataly Allasi Canales). This Book Is A Plant. Wellcome/Profile

2020 Foreward. The Heritage Herbal, Sonya Patel-Ellis, British Library.

2019 Elder Tree (Interview). Sylvan Cities , Helen Babbs, Atlantic Books.

2018 Melissa officinalis (Chapter). Collins Botanical Bible, Sonya Patel-Ellis, Harper Collins.

2018 Botanical Medicine at RBG Kew (Chapter). Agenda 2019: Tropicais Plantas Medicinais. Fernanda Botelho, Dinalivro.

Google Scholar Profile

2025 A global pharmacopoeia: George Barber and The pharmaceutical or medico-botanical map of the world (1869). Pharmaceutical Historian. 55 (4), 118-128.

2025 Legal use of potentially poisonous Plants: The case of British Herbalism. Journal of Economic Botany. 79 (1), 108-117

2022 Madagascar’s extraordinary biodiversity: Threats and opportunities. Science.

2022 Madagascar’s extraordinary biodiversity: Evolution, distribution, and use. Science

More on Google Scholar Profile

RADIO

2021 Food Programme: The Joy of Heat BBC Radio 4

2020 How did humans discover medicine? BBC CrowdScience

PODCASTS

2026 BBC Gardener’s World Podcast

2020 Kew Gardens Unearthed Podcast Curious cures

2020 Gastropodcast - Move over gin, we’ve got tonic fever

2019 Just the tonic - Foodie Pharmacology

2019 Foraging for medicine- Plant Based Podcast

2018 Handmade Apothecary - Eat Weeds

FILM

2026 Hamnet

2019 Maleficent II

2018 The Favourite

More about consultancy work

TV

2023/2019 Foraging for medicine Countryfile

2019 ‘Invitation au Voyage: Londres, Londres, la bataille du Gin’ Arte

SELECTED PRESS

2022 Walker, K. & Canales, N. Bitter Barks: legacies and futures of the famous fever tree. Resurgence and Ecologist.

2020 Walker, K., Quave, C., & Canales, N. No, Cinchona bark is not a cure for coronavirus. The Conversation.

Other press articles Here

BLOGS

2024 Quinine gingerbread: A seasonal tonic. Herbal History Research Network.

2023 Trading Trees: Trading Trees: Cinchona and Nineteenth-Century ‘Quinology’Kent University

2020-2022 Please check out my series of interviews with ethnobotanists at the Society for Economic Botany Student Blog

2019 Elder Power Kew Science Blog.

2019Tropical medicinal plant research - economic botany collection, Kew

2018The fever tree: help us transcribe a bit of history Kew Science Blog.