The best bet would be to prepare a submission and send it to a US publisher. The big problem would be to get postage for a reply, but if you send off a disposable manuscript, you can include International Reply Coupons (IRCs). You can get these from your local post office (be firm; some don’t know they exist). You’ll need at least two for a one-page letter from the US.
As far as publishers are concerned, http://www.ralan.com has a list of US publishers and what they are looking for. Note that No unsolicited subs means you should never send a manuscript (or proposal) to them without asking. In addition, if they say “no unagented subs,” they mean it.
Alternatively, you can look for an agent. This will be especially useful since you’re not located in the US. When choosing an agent, however, there is one iron-clad rule: Never, under any circumstances whatsoever, pay money to an agent. If they ask for a single cent before they sell your novel, run away. Fast. Check if the agent is a member of AAS, and ask for them to list authors and recent sales (if they refuse, run away). Ignore any of these rules and you’re screwed.
Also, beware of vanity presses, especially the electronic variety. Any publisher that asks for money in advance is out to rip you off. Don’t be fooled by “print on demand” publishers – they’re just high-tech vanity presses. There isn’t a chance in hell that you’ll make any money back from them, especially with a novel. Even “PublishAmerica” – which doesn’t ask for money up front – hits you with hidden fees and doesn’t indicate the true cost of publishing, which you will be required to pay. Stay away.
You can find some general writing advice at http://www.sfwa.org/writing. Good luck.