It is nice to hear many ideas from different players. The more good ideas and themes you are exposed to, the better. With that in mind, why limit yourself to just one chess book if you choose to read about chess? However, I would only read one at a time. Chess books take a lot of time, effort and patience to fully navigate. Reading a chess book isn't like reading a "normal book." It is more time consuming because you are constantly moving chess pieces (especially setting up and re-setting up positions) and because the goal is to really understand what is going on in the game.
With that said, I don't really know what your approximate level of chess is at the moment and I don't know how familiar you are with chess books in general. As a result, it is difficult to recommend any decision. I would also hold off on chess books that are really difficult to understand for the average club player. I've heard great things about Dvoretsky's Endgame Manual (a book I'd be interesting in reading one day, but I am currently reading My 60 Memorable Games by Bobby Fischer), but I've heard from many people to not pick up that endgame manual until you have a really good insight on most theoretical endgames because Dvoretsky assumes that the reader knows them all well already. Probably 2000 rating or so most people recommend before diving into Dvoretsky's Endgame Manual, but I might even consider taking a glance at it if you are around 1800+ rating (I like to read content at, or just above my current level because I find it instructive and because I think these books have valuable insights worth investing time into).
If you feel "super lost in any endgame position" then I would recommend another book, or perhaps no book at all (based on your approximate current rating and your confidence at endgames). Maybe try chess.com's endgame "drills" to get a feel for where you are at with theoretical endgame knowledge before diving into a challenging endgame book. 
I find resources like the basic drills on chess.com really helpful when learning.
From my personal experience, I know several players rated around 2000 who never got into reading a chess book (either read one once and quit, or simply never picked up a chess book at all). Simply learning chess fundamentals (like theoretical endgame knowledge) and getting into the habit of daily tactics/analysis of your own games can get you a long ways.
Hello there !
I recently got into reading some Chess Books, I just finished part one in "How to Reassess Your Chess Vol.4" and it was a surprisingly enjoyable reading, but i am interested in reading Dvoretky's "Endgame Manual" (Kasparov recomended it and i am super lost in any endgame position)
Should I focus in only one book at a time or reading more than one can be benneficial ?
Feel free to share your own personal experiences, I would be glad to hear it.