I used to write a book and sold very and reprinted, another publisher took my book and modified a bit then published a new one and sold well too, I was furiuos but had nothing protective to do as it was too troublesome to argue. Originanlly I learnt from textbooks or experience or manual ( if a software), then I wrote the book. I guess I was also stealing as the knowledge were not mine, I was bone uneducated and unknowledged, I l grow and learn and make new one. What is the definition of new one ?