I would like to study Queinnec's book "Lisp in Small Pieces". I already have the English version of the first edition, the French version of which appeared in 1994, at the time of the R4RS. A quick look at the table of contents of the second edition (of which only the French version exists) doesn't show any significant change: only the addition of some subchapters entitled "Recommended reading", and the demotion of some subchapters of the first edition to being only sub-subchapters in the second. Furthermore, Queinnec himself somewhere describes this book (published in 2007) as slightly revised and updated to the R5RS.
If anyone has both edition (or at least has browsed through them), is it possible to know in more detail where the two editions differ?
After all, the jump from the R4RS to the R5RS (and the 13 years gap between the two editions) is quite significant, so I wonder whether I should spend 40 Euros on the second edition (which, otherwise, seems hard to find in public libraries).