Three common reasons:
Search the file name in chat history; often authors share test builds there. questbook-3.1.exp-net2-1.12.jar download
Navigate to .minecraft/mods (create the folder if it doesn't exist). Three common reasons: Search the file name in
She right-clicked, hit ‘Save Link As…’ and watched the download bar crawl. questbook-3.1.exp-net2-1.12.jar download