'Whitewash and Brown Paint - Lovely - The Sketchbooks of Percy Kelly' is the book.
It's written by Chris Wadsworth of the Castlegate House gallery and self-published; one of several books produced.
See more images on the Percy Kelly page of the Castlegate website here
He has such a lovely sense of scale and placement and of composition - and clearly liked pattern - would have made an amazing surface pattern designer! - He died and lived most of his life in poverty as he found it really hard to bring himself to part with his work. Silly fella - plenty of people making money out of it now...
I love the work of Elaine Pamphilon and some of her paintings are reminiscent of Kelly's.
Elaine Pamphilon has a lovely website if you want more landscape and still life inspiration here
Pamphilon lives in St Ives and Kelly stayed and worked there