Five volumes, one per craft.
Each volume is a 50-batch logbook with a craft-specific reference library at the back — for beer, mead, wine, and cider — plus a fifth volume that records all four in one place. All five appear under the R J Barley editorial byline, published by Cellar Bench.
Why one pattern across five books.
Fermenters who work more than one craft tend to keep separate notebooks for each — and end up unable to compare the yeast they used in cider against the one they used in mead, or the racking schedule for wine against the one for cider. The five volumes share a batch spread, a reference structure, and a tasting language so the data lines up across crafts.
Each book stands alone — you don't need Vol. I to use Vol. III — but the Mastery Journal (Vol. V) makes the most sense when more than one of the per-craft trackers is already in your shelf.