Percy Smith died in 1948 and is rather forgotten. http://percysmith.com/ has some information. He was multi-talented and became expert in etching.
This is a book of 16 high quality collotypes of his terrific etchings and drypoints from the Somme, the most effective to me those showing utterly destroyed landscapes with titles like The Corner Cottage Main Street, The Village Church. He was a gunner. The cover is rather bashed up, but the plates are in more or less perfect condition.
Soncino Press is a UK-based publisher of Jewish texts, not quite clear if this is the same operation. The book was printed at Curwen Press and Oliver Simon was involved with both, that could be why they brought out this title. Interestingly, the introduction says that even by 1930 nobody wanted to be reminded of the Great War.