A second volume of haiku linked to images in a 5/7/5 format has been published to follow The Landscape as Haiku from 2023 that can be found here. The book has been published on Blurb where all the pages can be previewed at https://www.blurb.co.uk/b/12348913-the-river-as-haiku. The book includes a short essay on the use of river imagery in haiku poems, both by the Japanese masters and in more recent English examples.
