Warning: eBooks can seriously damage your poetry

Ideally, the text measure in a poetry book accommodates the normal length of a verse line. Shakespeare wrote relatively regular pentameters which require between 50 and 55 characters to the line. Don’t say that Kindle users haven’t been warned about the need to keep point sizes small to avoid turned lines. (Image above from the Mobipocket website, below Tschichold’s Penguin Shakespeare.)