Its a start . Right now I can start with something as simple as a theme switcher, and improvise from there.
Theme Switcher is great for that.
There are some themes/color schemes which are useless for book sellers, which can perhaps be replaced with modified forms made by tweaking the css, making the footer useful, and a few other additions/changes.
If this is what WordPress can do with ecommerce:
Then perhaps OSC, which is designed for ecommerce, can give it a run for its money.
I do see however, that there is virtually nothing about WP to OSC conversion, which makes anything related to it a daunting task.
A brief look at catalog.php of both sites is a bit unnerving.
Drupal would even be better than WP, but a quick look at my decently modified version using modules including their ecommerce modules, shows a hefty 50+ MB database size (without inventory) that would get sites shut down on many hosts.
I will post a link to the source code to my colleagues, 2 of whom are Java programmers. Perhaps one can unravel it, especially
as one seems good with mobile devices, where JQuery is probably abundant.
I just needed a place to start!