One of the companies I write about in SHORTER (US | UK) is IIH Nordic, a Copenhagen-based data marketing firm that implemented, and has become a Nordic model for, a 4-day workweek.

Now, there’s a new book by journalist Pernille Garde Abilgaard, Manden der knuste kalenderen for at gøre sine medarbejdere lykkelige (the title translates roughly into “The man who broke the calendar to make his employees happy”), about IIH Nordic and its 4-day week.

I spent a little time with Pernille when I was last in Copenhagen, and it sounds like an interesting project. It’s pretty focused on the experience of IIH Nordic, but I don’t find these kinds of deep dives to be competition with a book like SHORTER; I think there’s value in both projects that look in great detail at particular firms (something I can’t do in a book about a hundred companies), and books (like SHORTER) that look across a large number of places, and try to see the commonalities in trials happening on different continents.

Most important, it’s another data-point that indicates that the 4-day week is quickly going from a total curiosity, to something that a growing number of people are at least willing to entertain the idea that a shorter workweek can work.