For decades, this was the standard university-level text for geometry. It essentially "cleaned up" earlier, less user-friendly works like Roger Johnson's Modern Geometry . Today, it remains popular among participants in high-level and researchers looking for historical references to original geometric proofs.
Added in later editions to broaden the scope of synthetic methods. Historical Significance
If you are looking for a more concise or modern summary of these concepts, similar material is often covered in Paul Yiu’s Introduction to the Geometry of the Triangle , which uses modern barycentric coordinates.