While the 4th edition is excellent, you don’t need to pirate anything to learn Arduino. Here are five completely legal, up-to-date alternatives:

| Resource | Type | Best for | |----------|------|-----------| | Arduino Official Tutorials (docs.arduino.cc) | Free online | Built-in examples (Blink, Fade, Button) | | Adafruit Learning System | Free guides | Projects with sensors, displays, motors | | Paul McWhorter’s YouTube series (Arduino Tutorial 1-65) | Free video | Absolute beginners, high school level | | Tinkercad Circuits | Free simulator | No hardware needed, browser-based | | Arduino Project Hub | Crowdsourced projects | Real-world inspiration |

Pro tip – Combine the official Arduino documentation with a low-cost starter kit (Elegoo or official Arduino kit). You’ll learn more by doing than by reading alone.

AppNee operates in a legal gray zone. While it offers hard-to-find technical books and legacy software, the Arduino book is still under copyright (Maker Media, later O’Reilly). If you like the book, buying a legitimate copy supports the authors and the open-source hardware community.

That said, many beginners discover Arduino via these free PDFs, then later buy hardware or official kits — so the ethical impact is mixed.

The book suggests an Ethernet shield. Modern approach for $4:

AppNee (appnee.com) is a well-known Chinese-curated platform that repackages software, ebooks, and tutorials — often with patches, keygens, or simply clean PDFs — for free download. Their release naming convention includes the site name first, then the original title + edition.

So “AppNee.com.Getting.Started.With.Arduino.4th.Edition” is almost certainly a scanned or DRM-stripped PDF of the 4th edition, bundled optionally with code examples or tools.

int sensor = A0;
void setup()  Serial.begin(9600); 
void loop() 
  int val = analogRead(sensor);
  Serial.println(val);
  delay(200);

Open Serial Monitor (Tools > Serial Monitor) to view readings.