Hello Jean-Michel:
Unfortunately, The Ins and Outs of Mathematica was never published as a book. Almost exactly 30 years ago I was offered a book contract by Paul Wellin who was at that time working for Springer. My idea was to collect together the most useful ideas from the Mathematica Journal columns—In and Out and Tricks of the Trade—which I either wrote or edited over the period 1990-2007 from user submissions or ideas posted to MathGroup (the role of which has been supplanted by the Mathematica Stack Exchange (MSE) and this Community) into a useful reference book. However, my academic career and family responsibilities intervened, so the book was never finished.
I do have a complete set of all printed issues of the Mathematica Journal up to my last column in Volume 10(3). But, as I worked on the book, each new version of Mathematica caused me to stop and pause, re-writing—or even deleting—whole sections. as new functionality was added that made much of my material essentially redundant (except, possibly, as examples that could be included in the built-in documentation).
In my view, the two fundamental differences between the MSE and Community are
- MSE is usually the best place to ask questions and search for answers—so Q&A
- You can post full notebooks to the Community, including interactive functionality.