Sea of Tranquility: A Novel by Emily St. John Mandel
From the publisher's website:
In this captivating tale of imagination and ambition, a seemingly disparate array of people come into contact with a time traveller who must resist the pull to change the past and the future. The cast includes a British exile on the West coast of Canada in the early 1900s; the author of a bestselling novel about a fictional pandemic who embarks on a galaxy-spanning book tour during the outbreak of an actual pandemic; a resident of a moon colony almost 300 years in the future; and a lonely girl who films an old-growth forest and experiences a disruption in the recording. Blurring the lines between reality and fantasy, Emily St. John Mandel’s dazzling story follows these engrossing characters across space and time as their lives ultimately intersect.