There are 15 achievements; one requires clicking on the mummy multiple times at the end of the game. If you are stuck on a specific scene, let me know: What is the current objective in your journal? Which room or location are you currently in? What items do you have in your inventory?
If you are playing on a mobile device and can't interact with the coin slot, zoom in with two fingers first. Brightstone Mysteries The Others [0100F31019DD0...
You need to find and categorize missing books. The purple book is for Medicine , the green book is for History (categorized as Science Fiction in-game), and others include Art , Chemistry , and Botany . There are 15 achievements; one requires clicking on