Whilst I use linux, I've never tried to use ADE on it, so can't really say how well that'll work with wine.
Book wise, try
O'Reilly they sell DRM free books so you should have no problem loading those via linux. Don't discount Amazon just because you don't have a kindle though. If your device supports mobi format, you just need to remove the DRM, otherwise you'd also need to convert (which is pretty simple with calibre).
That said, if you find most of the tech books you'd want are available on amazon, something like the DX might be more suitable due to larger screen size working better with PDFs.
Have you considered the kindle? Due to the wifi delivery you can pretty much avoid any platform issues you may otherwise encounter, plus it appears as a standard USB hdd for loading of non DRM'd content. Screen is imo too small for reading PDFs though, DX would be better suited to that (or ipad), but if the tech books are reflowable, kindle is worth a look.