Is it ok to sing from a book? Yes if you must but much better if you don't.You can do better with the tune and express the meaning of the song if you have learned it.I hear some people boast about how many songs they know and yet rarely get through a song without a stumble sometimes even using a book. So the trick is to learn the bloody song.If necsassery limit the number of somgs in your repetoire to the quantity within your learning capacity.You do not have to sing a new song evey session. I am getting on a bit now and stuggle to remember songs so I do have all mine in a folder. I know what I am going to sing and some times If it's one I havn't sung for a while I give it a quick read through before I start. But that's all

Joe Nicholson