Geoff

@amoroso @pesco @davidgerard @cdegroot Sure. On my fairly vanilla 'Debian GNU/Linux 13 (trixie)' installation, I double-clicked and it opened in Atril (v1.26.2). It opened just fine and is quite readable - I've attached a screenshot for you showing some of the more complicated formulae. I didn't make any edits to the epub - this is the same file as it was downloaded from Lulu. It seems just fine! (There's a minor problem with the navigation on the left but it may not be specific to this epub.)

@amoroso @pesco @davidgerard @cdegroot I’ve just bought the Lulu epub edition. If there are any specific DRM checks you’d like me to try please let me know. (All I’ve done so far is use sendtokindle.)