This book is the best for understanding metal materials. There may be markings with a highlighter and some scribbles. This is for those who are okay with it as long as they can read it. ・This is a used item, so there may be scratches, scuffs, and stains. ・No returns. ・Instant purchase is welcome. ・No price negotiations. ・Recycled materials will be used for some of the packaging. ・Please note that due to work, it may take some time to reply or ship.