Risking to derail this thread even more: what stopped me the most is the fear of being caught by propietary formats. Is it the case of Kindle? Googling about ereaders, seems overwhelming to me.I use kindle for most light reading. For the technical, pdf remains th best except in the case of large schematics.
In that vein, maybe a return to the past with block diagrams opening a new page linked to the schematic.