Will This Work: Ikea ODDA wall cabinet converted to low bookcase

I'm new to Ikea hacking (or any sort of furniture construction for that matter), and have an idea of what I want to do but am unsure if it will work.

I need a low, long & shallow bookshelf and after scouring the web for ages & coming up empty-handed I decided to look for pieces I could hack . . . Et voila! I came across Ikea's ODDA wall cabinet:

http://www.ikea.com/us/en/catalog/products/10120573

I would like to stack/fasten together two of these units and add either casters or hairpin legs ... I'm thinking it will most likely be too heavy for the hairpins & I'll need a support for the middle of the unit. This is all speculation, of course, having never done this before.

If anyone has any advice, it would be much appreciated!

Thanks!

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