I love reading and I underline and make notes in books that I like.
A number of years ago I discovered that a squiggly line made freehanded, looked a lot neater than a straight line made freehanded. And when, a few years ago, CBD, accidentally included two of those Straight-Edged Rulers in my order, I fell in love with them.
The scalloped edge makes anything you underline look neat and important.
I usually buy 10 or 20 at a time and give them to friends or include them in gifts. I have a least 6 of them that I use all the time. I have one in with the pens and pencils anyplace I read,---kitchen, living room, family room, office, etc. I think they're great , and so do the people I give them to.
Perfect mini gift . Good for all the obvious reasons...underlining, bookmark. Appreciated by the new believer who does not have to "fumble" around to find that passage Pastor just asked us to turn to. Buy some.