"The Sound of a Wild Snail Eating: A Memoir" by Elizabeth Tova Bailey is $1.99 at Amazon & Kobo, with many fascinating details about the natural history of snails and about the author's own observations while bedridden with autoimmune illness.
https://www.amazon.com/gp/aw/d/B00408A828/
https://www.kobo.com/us/en/ebook/the...ating-a-memoir