Official Sources:
* The books themselves: Most editions of the book will have illustrations of the characters, though these may vary depending on the edition.
* The movie adaptations: The 2010 movie adaptation of *The Lightning Thief* features actors playing the characters, so screenshots from the film can be found online.
* The Disney+ series: The upcoming Disney+ series will also feature actors playing the characters, so pictures from the series will likely become available once it is released.
* Rick Riordan's website: Rick Riordan's website may have some official artwork or photos related to the book series.
Fan-Made Content:
* Fanfiction websites: Many fanfiction websites have fan art and pictures of the characters.
* Social media platforms: Sites like Tumblr, Pinterest, and DeviantArt have a lot of fan art and pictures related to *The Lightning Thief* and the Percy Jackson series in general.
* Online search engines: A simple search for "[character name] the lightning thief fanart" or "[character name] the lightning thief artwork" on sites like Google Images or Bing Images will yield a variety of results.
Important Note: Keep in mind that not all fan-made content is official. Some depictions may vary from the descriptions in the book, and some may not be as accurate as others.
Remember to always check the source of any image and consider its accuracy before using it for any purpose.