TD wrote on 06/15/20 at 18:05:18:

Yes, the e-books are kindle, so they work anywhere. And the app-books are ios and android only. I suppose you could use an android emulator on Windows if you were desperate. Information about the app-books:
http://gambitbooks.com/webapp/appbooks.html

I bought a couple of app-books, just to see how they work. They work well! There is some functionality not available in the kindle versions. But I won't buy many that way, because like all such services, if/when the company goes away, so would/will my books.

winawer77 wrote on 02/25/08 at 18:21:11:

Well that is the promise of the CS.

"Meeting 7.Nd2 is key - I have always followed Panczyk and Ilczuk with 7...dxc4"

Here's the ...dxc move delayed a little bit:
1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Nf3 Nbd7 5. Bg5 c6 6. e3 Qa5!? 7. Nd2!? Bb4 8. Qc2 O-O 9. Be2 dc4!? 10. Bf6 Nf6 11. Nc4.

P&I analyze 11...Bxd3 and 11... Qg5 starting on pg 142. They note that black can transpose to 7...dxc lines, specifically those lines covered on pg 129-131 with 11...Qc7. Chess Publishing covers the move order I gave above, and continue with 11...Qc7. I've verified that this transpose to 7...dxc lines on tempo. After 120-0, CP continues with P&I's main line of 12...Rd8. I might prefer another move given by P&I, namely 12...b6.

So why bother playing a 7...dxc line through a 7...Bb4 move order? Well, as always, it's about the alternatives permitted or denied along the way. I am already familiar with the 7...Bb4 sequence and it's sidelines. If I were to switch to the 7...dxc move order I would have to learn the 10g3 side line among other things.

I have the paperback version of P&I's book. It is also available electronically as a kindle file. It's like a book, but you can pull it up on your PC. Unfortunately, neither PGN nor ChessBase formats are available. Gambit publishing sells an electronic version that you can use on your "device." I assume they mean a phone or tablet, not a Windows computer.

Just a heads-up. This book popped up in the store of the Chess Studio Android app of Gambit. Looks very interesting and well organised, ideas are explained and the opening is solid.

Paulsen in "Chess Developments Semi-Slav 5 Bg5" gives 16...Ng6!= followed by f6.

I think that the Cambridge Springs is the perfect blend of solidity and dynamism, I'm amazed that it is not played more often. 

Meeting 7.Nd2 is key - I have always followed Panczyk and Ilczuk with 7...dxc4 although I find the positions a bit similar to the 6.Bxf6 Moscow, although maybe slightly more passive. This made me look at the traditional mainline a bit more, especially as someone played it against me a few weeks ago. I think that White does have an edge in P & I's main line, but it is hardly anything for Black to worry about. Can't find much in the way of practical examples though.