An astronaut bound for deep space is heading to bookshelves first. Hanover Square Press will publish Earthrise: Inside Artemis II — the Groundbreaking Human Mission into Deep Space on October 27, 2026, according to Publishers Lunch.

The book is co-authored by Jeremy Hansen and John Larsen. Hansen is described in the announcement as the first Canadian to travel into deep space — a distinction that places him on the four-person Artemis II crew, the NASA-led mission intended to send humans around the Moon for the first time in over half a century.

Erin Somers, a novelist and journalist, is credited as the book's author in the Publishers Lunch listing, working alongside Hansen and Larsen to shape the narrative. The deal was brokered by literary agent Hilary McMahon of Westwood Creative Artists, a Toronto-based agency — meaning the representation for this title came from Canada's largest literary firm rather than a New York or London house.

Hanover Square Press is an imprint of HarperCollins, one of the so-called Big Five English-language publishers. An imprint is a distinct editorial brand within a larger publishing house; in this case, Hanover Square focuses on narrative non-fiction and has a track record of acquiring titles that blend current events with personal stories. The book carries ISBN-13 9781335004154, as listed on the HarperCollins website.

The rights deal extends beyond English. Michel Lafon, a Paris-based publisher, will release a French-language edition — a signal that the book's backers see a readership across multiple markets rather than a single national one. The announcement did not specify publication dates for the French edition.

Chris Hadfield, the Canadian astronaut whose 2013 space-station rendition of "Space Oddity" made him a global name, wrote the foreword. Hadfield's involvement ties the book to a Canadian space narrative that already commands wide public recognition.

For readers, Earthrise arrives three weeks before the October's end — placing it squarely in the autumn publishing season, when houses concentrate their biggest non-fiction releases to capture holiday gift-buying and year-end best-of lists. Whether the Artemis II mission itself will have launched by then remains a separate question; the book's value, for its publisher, is that it lets readers inside the preparation and the human story regardless of the flight timeline.

The Artemis II mission is designed to send a crew of four — including Hansen, NASA astronauts Reid Wiseman, Victor Glover and Christina Koch — on a free-return trajectory around the Moon. No landing is planned; the mission is a stepping stone to Artemis III, which aims to return humans to the lunar surface.

What makes the deal notable in publishing terms is the combination: a first-hand account from an active astronaut, a literary agent based in the author's home country, a Big Five imprint in the English market, and a parallel French edition — a chain that links Toronto, New York and Paris around a single manuscript about a flight that has not yet happened.