Check your coin book on the Lincoln cents. They remove that after the 1909 year, but later added it back in 1918, but on the OBV side under Lincoln's shoulder. Look at any "Red Book" and you will see the information.
Ok, well I haven't gotten far enough into the hobby to purchase any books. Is it called "The Red Book" in the title?
It depends upon your age and eyesight, but, you can get it in spiral bound and large print like I do.
At 61, I'm not too far from you! Yes, I've found with this new hobby, I need my phone flashlight, as well as a magnifier. Thanks to Collecting Nut for the book's official name.
My loupe has a bright light attached to it. I've had to change the batteries for the light, but it really helps. (Currently unavailable, but there's tons of them.) On the other side is the on/off switch. The light is bright and shines directly where you need it. https://www.amazon.com/gp/product/B00AHTL87S/ref=oh_aui_detailpage_o01_s00?ie=UTF8&psc=1
That's funny, I just purchased the Yeomans Red and Blue book from Amazon, and I was looking at their magnifying glass, but decided not to purchase it. Thanks for the tip and website. I'll look now.