Sources for light novels that work with plain text dictionaries like yomichan

I’ve attempted to use Bookwalker but the light novels I’ve bought are all high quality scans of the source materials, and I can’t easily look up kanji with this because I cannot select the text directly. OCR tools are kind of a last resort. Anyone have advice for where to look for content I can access on my pc and maybe my phone as well? Thanks in advance!