If you want to build your own complex tools, focus on the "Principles" section to understand expression evaluation.
Focuses on solving complex problems in specific scientific fields.
Advanced calculus, linear algebra, and large-scale programming. Key Features and Content The Mathematica Book, Fifth Edition
Functional programming, pattern matching, transformation rules, and how Mathematica represents and evaluates expressions. Part 3: Advanced Mathematics in Mathematica
This section serves as a readable tutorial for basic operations. If you want to build your own complex
Open a Mathematica notebook and type the examples directly from the book to see live results.
This is the "deep dive" into how the language actually works. or The Mathematica Book
amazon.com/Mathematica-Book-Fifth-Stephen-Wolfram/dp/1579550223">bookstore or library near you, or The Mathematica Book, by Stephen Wolfram