I remember one of the Polgar sisters writing about how difficult it was for her to make initial progress past the 1800s. Up to that point opponents would always make a blunder of some sort that she could take advantage of. Suddenly the whole game changed when she had to outplan her opponents. So no, your experience is not unique, and taking advantage of your opponent's errors is the way most chess games are won until you're within shouting distance of expert.
I'll get you Coach Heisman's book list, but IMHO the Chess Mentor is a more efficient way to learn, and you've barely touched it. Just sayin...
http://www.danheisman.com/Events_Books/General_Book_Guide.htm
Hello friends! Today I reached 1604... I'm very happy about it that I just came in 1600 line.. (I was dreaming about it from a month..., it may be not a good rating for you but it is good for me at present).. But.. whenever I win, I feel it like I won because of my opponent's mistakes and not because I play good.. What usually occurs with me is.. I feel like I'll definitely loose,.. my opponent makes a blunder and I win.. :-P I don't want to win that way.. :( Do you feel same or its just me? I tried improving my game with lessons and by watching top games but I still don't feel confident. And.. do you think that it is worth reading books on chess for a player like me..(rated 1550 to 1600)? if yes, it would be great if you could tell some sources or books.. Sorry for not an interesting post.., I just wanted to share it and know your opinion. I wish you all have a nice day! Thanks..
Update (May 30, 2016): I am 1700+ now, my highest is 1730 (May 9, 2016), my best win is 1849, and i still feel the same most of the time. (not always)
I think things will change after i get to 1800 :)
interesting, yeah! ;)