(Additional Note) I will remove this listing on the 20th due to studying for exams. Thank you for viewing. Denki Shoin d-BOOK Series Analytical Geometry and Vector Loci This is one of the reference books I purchased for the Class 1 Electrician exam. The content also covers electrical circuits, but it's mostly mathematical geometric analysis. There are quite a few markings with a highlighter and pencil throughout the book. No pets, no smokers. Thank you.