Today I bought 3 books on the Reti opening

I went to the chess-store today. Got three books on the Reti opening! I'll start with the book "starting out: the Reti". I'm looking forward to gain knowledge about this opening, and to test it in games!

interested in your opinion on these books, and also if someone who know them could share their idea 

I had, for several years and without success, been trying to understand the Reti Opening. I had owned the "Dynamic Reti" by Davies for a couple of years, but what it presented did not make much sense to me. I would later determine that about 30% of the example games were not even close to being the Reti Opening.

When it was announced that "starting out: the Reti" by McDonald would be released, it gave me enough confidence that I created this club. I felt that soon, a bunch of us would be studying this book and comparing what we had learned.

That did not happen.

Instead, McDonald's book added to my confusion. This is mostly due to the manner in which the material is presented. I would learn later from book reviews that this "starting out" book has many omissions and is not really a "starting out" book at all. It is written for those who already have a fundamental understanding of the Reti Opening. It turns out this is even more true of Davies' book, in which he presents his personal repertoire along with his personal deviations. These "might" be helpful to some, but they sure didn't help me. In my opinion, the most valuable part of McD's book is in the introduction. Play close attention to what he says about the d-pawn - "A strike against the Black center".

Finally, someone told me about Dunnington's "easy guide to the Reti Opening" 1998, and that was when I began to truly understand what the Reti is and how to play it. Later I learned of "1.Nf3 d5 Reti" by Viacheslav Osnos from 1982, which provides hundreds of great example games, all of which are much closer to the source due to their age. This book is hard to find these days and quite expensive as a collector item.

There is also "Winning With The Reti Opening" by Smith and Hall 1993 which I recommend highly.

Then, as if to add to the confusion, Delchev published "the Modern Reti", which was very popular but is not about the Reti at all. It is about transposing to the Queen's Gambit via the Reti move order. More than 80% of the example games are classified as Queen's Gambits, Catalans, etc.

Then, just three years ago, "The Modernized Reti" by Adrien Demuth was published a year late, but well worth the wait. This is, to me, how opening books should be organized. He does not present a bunch of cleverly annotated games, but rather he presents the variations and their move orders, along with his appraisal of each. This book is excellent and belongs in the Reti Library. My only complaint is that most of the move orders favor the kingside fianchetto, whereas I prefer the double fianchetto. But objectively I would go with Demuth's recommendations.

The latest contribution to the Reti library is "The Reti - Move by Move" by Sam Collins. All of the major openings had been dealt with in the "Move by Move" series of books except the Reti. And when it was finally announced, it would take more than two and a half years from the date I ordered this book until it was finally delivered last November. Most of the example games presented in the book were played during that waiting period. My feeling is that Collins had a contract and was reluctant to fulfill it until the publishers pressured him to do so. But in fairness there are some very good games and they will bring you up to date.

My biggest complaint about the Collins book is Chapter 2 - 1.Nf3 d5 2.c4 dxc4 which consists of a single game in which 3.e3 is played. Collins completely brushes aside the 3.Na3 variation by saying Delchev dismissed it. In fact much of his commentary throughout the book consists of following the recommendations of other writers (mostly Delchev) and engine analysis. I don't think he put much of himself into this book and the whole thing seems hastily put together. Disappointing but still worth having.

thank you for your exhaustive reply! I look forward those books 

When I found this group I also found a  video with an IM teaching Reti' on this page. That was most helpful!

Which video?

debut reti by osnos is cool too, plust was released in 1990,.. right at the end of a lot of chess theory, so it isn't half bad.