This Video Tutorial explains how to fix the PC version for Windows 10/11, including 4K resolution support and bug fixes.
A digital version of the original Instruction Manual provides basic controls and setup information.
Comprehensive guides for game mechanics and spell lists are available on GameFAQs for the PlayStation 2, Xbox, and Game Boy Advance versions.
You can find the complete dialogue and scene descriptions on the Harry Potter and the Prisoner of Azkaban Movie Transcript page.