Of course. Why wouldn't they?
Do studying chess books make you better?
Yes, and the series by Seirawan are among the best for players below 1800 FIDE. His Winning Chess Brilliancies is excellent for players at all levels, although it would prove quite challenging to beginners.
"My First Chess Book" by Ziryab
http://chessskill.blogspot.com/2012/03/my-first-chess-book.html
For the endgames, read only Rook & pawn books. The others will never happen in your games anyway.
Baloney. I get the minor piece endings regularly not to mention Queen endings. I also recently had to mate somebody with a Queen vs. Knight in time pressure -- not as easy as you think (while avoiding the 50-move-draw rule)
For endgames, one common suggestion is Silman's Complete Endgame Course by Jeremy Silman.
https://web.archive.org/web/20140708103149/http://www.chesscafe.com/text/review594.pdf
http://www.theweekinchess.com/john-watson-reviews/theres-an-end-to-it-all
As for learning from reading, don't forget that playing is part of the normal process. "... if you aren't enjoying yourself, you will become discouraged, frustrated and bored. ... When you get to apply - in a real game - what you've learned from a book or computer screen, the information is reinforced in a powerful way." - Andrew Soltis (2009)
On Jan 28, 2015, a player (who got over 2300) told us about his start.
"... when I was a kid (10 or 11) playing in USCF events for the first time, I just wanted to PLAY. I didn't care if I got smoked or not ..."
I am half way through studying winning chess strategies by Yasser, the books is good and I have learned a thing or two about middle games but are chess books and online games alone good enough to improve my skills?