First paragraph

[martinacantaro]

We are not academics, and we are not experts in the topics we are going to discuss, but we are passionate, proudly amateur enthusiasts

• The authors of this book are not academics but a multidisciplinary team of practicioners from different backgrounds

• "range from" is always accompanied by a "to" (i.e. from Engineering to Economy)

• "training about" is not a phrasal verb.

[entropidelic]

following your suggestions, I changed the paragraph to

One of the first things to note about this book is that it is not an academic textbook. The authors of this book are not academics but a multidisciplinary team of passionate, amateur practitioners from different backgrounds, namely Engineering, Computer Science, Physics and Economy, that converged their approaches in this book, and that day by day keep reading, learning and applying new approaches, technologies and ways of thinking.

I insisted with the "amateur" because Federico told us to explicitly use the word. Do you think it is ok?

[martinacantaro]

sounds good!

"converged their approaches" sounds a bit abstract, express the idea using simpler, more concrete words