If you want to read on a Kindle or Kobo, search for "CBZ" files instead of PDF. PDFs on small e-readers are often unreadable because they don't reflow. You can use Calibre (free software) to convert a downloaded PDF into a Kindle-friendly AZW3 file.
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| Format | Best For | File Size | Quality | | :--- | :--- | :--- | :--- | | | Windows/Mac viewing, printing pages | Large (Good) | High (Vector text) | | CBZ | Kindle, Kobo, ComicRack (Tablets) | Small | Original resolution | | EPUB | Reflowable text (Not good for art) | Tiny | Pixelated | If you want to read on a Kindle