Interglacial Narrows gathers a range of Pierre Joris' poems written between 2015 and 2021, including an extended version of the Book of U / Le livre des cormorans by Joris and Nicole Peyrafitte, initially published by Galerie Simoncini in Luxembourg in 2017.

Both central to the book and opening up its time-lines is the section "Homage to P.C." Put together in 2020 to celebrate Paul Celan's 100th birth-year, it gathers poems the earliest of which dates from 1969 & the most recent from 23 November 2020, the day Celan would have turned 100 years old.

The final section of the book is a diaristic sequence of poems & notes started during the spring of 2020, i.e. at the moment the covid-crisis hit NYC the hardest.