Re: Texas Rangers book / Ambrose Bierce
I've moved on from this book and can't really recommend it as cover-to-cover reading, unless you want to be stupefied with minutiae. Some people like that, but I can do without. So when I saw that it was tedious, I marked the chapters that interested me and read only those. The book has an excellent index and some tables in the back, and I'll use it as reference in the future.
That period (1910-20) is an interesting one in the history of the Texas Rangers. The Mexican Revolution was going on just across the border, and then WW1 came along and Mexico was simpatico with Germany. So the border had to be guarded. And in 1915 some Mexicans launched a small war (The Plan of San Diego) and made several raids into Texas. So the Rangers were pretty busy during that decade.https://en.wikipedia.org/wiki/Plan_of_San_Diego
I've moved on to The Conquest of Peru, by Prescott. I read his Conquest of Mexico, and the Peru book is shaping up to be a very worthy companion piece.