Gents and Madams,
Latest book in the inventory is "Black Powder, Pig Lead and Steel Silhouettes", by Paul A. Matthews. Wolfe Publishing Company, Prescott, AZ, 800-899-7810.
The well written Preface to this book is ever reminding of old pharts taking up new hobbies.
Some of the Chapters:
Crossticks, Bullet Observations, Barrels and Chambers, Primer Wads, Powder Compression, Neck Tensiion, Barrel Seasoning, Making bullet lube and lube moulds, tapered bullets and throats.
Like most the first book in the inventory was SPG Reloading Primer. Many years later Croft Barker's 'THE BLACK POWDER CARTRIDGE SILHOUETTE HANDBOOK", then Mike Venturino's "'SHOOTING BUFFALO RIFLES of the OLD WEST". Obviously Paul Matthews many other books on the .45-70 are also interesting reads.
Coupled with "The Black Powder Cartridge News", "Single Shot Exchange", "Single Shot Rifle Journal" and "Shoot" magazine a serious library of reference materials is readily available to those that are so inclined.
Failing to mention "Introduction to Black Powder Cartridge Rifle Loading", by Chuck Raithel (Coydog) would be a disparity.
It's not difficult to enlighten one's self with many year's of experience by others involved in this ever so interesting and obsessive hobby of BPCR shooting and cartridge reloading.
The seven (last count) websites dedicated to BPCR are also chock full of opinions, ideas, experiences and personalities.
Perhaps this list of publications and references can be supplemented?