Wellfleet Press imprint, it's 128 pages and will be available in paperback format.
The Sherlock Holmes Puzzle series includes visual puzzles, brain teasers, math and logic puzzles and more, but this volume contains code puzzles of all sorts. The puzzles are arranged in roughly in increasing difficulty so the easier puzzles progress to some more challenging ones (there are some I haven't managed yet).
The puzzles are accompanied by fun line drawings and hints/tips. (I found myself tripping over the hints without wanting to, so readers might want to cover part of the page with a piece of paper to avoid "cheating"). The solutions are included in the back of the book.
Really well done puzzles with a fun tie-in to the great detective himself.
Five stars. Hours of fun to be had here.
Disclosure: I received an ARC at no cost from the author/publisher for review purposes.