In what order should I read these books?

How to Reassess Your Chess (4th edition)- Jeremy Silman Silman's Complete Endgame Course- Jeremy Silman 100 Endgames You Must Know- jesus de la villa

"... if you have just learned to play, all you need to study is the section [of Silman's Complete Endgame Course] designed for beginners (Part One). After mastering the material there, put the book away and spend your time studying tactics and a few strategic concepts. Once ... you feel you're ready to break into class 'E', re-open this book and master the material that's been designed for players rated from 1000 to 1199 (Part Two), then repeat this process as you move up the rating ladder. ..." - IM Jeremy Silmam (2007)

So, in your case, you might feel ready to make sure that you know the material up to page 88.

"... The Amateur's Mind … (for players 1000 to 1600)

How to Reassess Your Chess 4th Edition … (for players 1400 to 2100) …" - IM Jeremy Silman (2010)

"... the 2000+ player for which 100 Endgames You Must Know is really intended ..."

https://web.archive.org/web/20140708105702/http://www.chesscafe.com/text/review645.pdf

"... Players from 2000 up to International Master will find 100 ENDGAMES YOU MUST KNOW quite useful." - IM John Donaldson

http://www.jeremysilman.com/shop/pc/100-Endgames-You-Must-Know-78p3863.htm

https://www.newinchess.com/media/wysiwyg/product_pdf/9026.pdf