This book, Painting In Oil by Louise McLaughlin was published in 1888 by the Robert Clarke and Company in Cincinnati. The ebook is public domain for you to enjoy.
The book is a simple read, but it still points out all of the important principles of oil painting. What I love about this book is the charm of centuries ago, and is still readable and enjoyable.
Since oil painting is about six centuries old, little has changed its application, thus books from the early years can still be relevant in some sense today. Yes, many pigments have changed, perhaps your use of solvents has changed, like mine, but still the inspiration of creating a picture with oils continues to inspire the world.
You can download the PDF from Archive.org.