I had an absolute incredible experience solving this with one of my friends. Took us about 4 hours to fully solve over the course of 2 days! I learned about this from a youtube channel called Icely Puzzles, and paused their video to try it out and got totally sucked in. While completing this, I never really felt like I was totally lost, and always felt like I had a way to try and push forward in figuring it out (even if it took me a while to figure out the meaning of the bottom numbers/letters, page numbers, and some of the hidden words in general!). There were a bunch of pretty funny moments as well, such as every step involving the "Aaaaa" page and the double zodiac catching us totally off guard in puzzle 11. Had so many "aha" moments that we lost count. Had the most difficulty with Puzzle 1 and 2 since the theme eluded us for a while, but it clicked really quick once we got it. Ironically puzzle 11 helped find the themes to go back and complete puzzles with. I liked all the hints, it all felt intentional while still making us think so much.
The only part we couldn't understand and something I wanted to ask about was the pumpkin/jackolantern-esc drawing on puzzle 8, right in the corner next to the f9. Does it mean anything? :o We couldn't figure out how it was connected or what it meant/what hint it was giving!
Amazing set of puzzles and wonderfully crafted, never thought I'd be so into a word search!!