Learning chess over the board vs using software I have some good quality chess books and of course use the chess board to follow all chess game examples and variations provided. However I noticed that it is quite a tiring activity as it takes time and I do sometimes lose  the sequence of moves as I lose focus when switching between board and the book.

Not long ago I found that there are ebooks (CBH, CBV and PGN file format) which allow to "read" books on a chess application (chessbase, fritz etc) and examines provided using software. 

The question I want to ask actually about learning: do you learn more by physically interacting with the pieces (reading book and moving pieces) or you find yourself learning more and quicker by interacting with the software while going through variations?
You always pay attention when moving heavy wooden pieces. Work with PC can be faster but make sure you don't do it too superficially. Sometimes I just wheel the mouse, listen to the music and after checking twenty games of my opponent I don't know what is his first move. I like the old style learning, it isn't that powerful technically but still it can produce better results. The faster you play the lines, the less understanding you will get. That's why real pieces and books are not dead for training. I would go for watching videos on pc but I think I wouldn't read ebook on it.