read book indicator (7 Days To Die)

who will tell you how to identify a book or drawing / diagram that you already know. the only way is to type the name into a search engine, but it takes a long time. sometimes you find five books and check each hemorrhage. I remember for a long time I heard somewhere that somehow you can identify the read book. I've tried many times to find the differences before and after reading. but I could not see it. I saw roofing felts in vidos according to the announcements of new alphas, or someone described the mod. tell me who knows what.