It was a typical Wednesday morning at the Columbia University medical center, where Dr. Eric Kandel, a renowned neuroscientist, was preparing for his lecture on the principles of neural science. As he sipped his coffee, he thought about his upcoming presentation and the thousands of students who had relied on his textbook, "Principles of Neural Science," to understand the intricacies of the human brain.

The lecture that day went smoothly, with students engaging enthusiastically with the material. Afterward, several students approached Eric to thank him for making the PDF available. One student, Sarah, mentioned that she had been struggling to understand the chapter on synaptic plasticity but that the PDF had helped her grasp the concept.

Eric's face lit up with a smile. "That's fantastic, Maria! I'm so glad we were able to resolve this issue. Our students need access to this material to learn about the amazing world of neuroscience."