As far as I gather from the end note, these "illustrations" are actually a selection of independent paintings, later put together with text. There are themes -- night, imagination, mystery -- but no story. Each image really stands on its own. Many of Gonsalves' paintings are lovely, especially the ones of the natural world, trees, sky, light and dark. His interior spaces and humans didn't always work quite as well for me. The text is pleasantly poetic but not memorable. The only lines that really struck me were the closing verse, Imagine a night...*/...when the space between words/becomes like the space/between trees:/wide enough/to wander in.
*These are the author's own ellipses. There are many of them.