Don't try to Increase your concentration level

you dont need to increase concentration level during to read a novel. but when you start to do some job at your desk in the office, then you need to increase concentration. why? just because of your attention and attitude.... actually you don't need to increase concentration level ...or sensual effort unnecessary, because it is already in you. now you only need to understand your attitude and attention. Now days a lot of baba's or so called God Man try to increase concentration level and also provides so many techniques for increasing concentration. but do you think it is possible to increase it. I dont think so.