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Look for an agent. Don't give up until you've exhausted everybody who's a good fit. And look beyond Australia. Be sure you're querying agents that actually represent the type of book you're trying...
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#4: Attribution notice removed
Source: https://writers.stackexchange.com/a/3753 License name: CC BY-SA 3.0 License URL: https://creativecommons.org/licenses/by-sa/3.0/
#3: Attribution notice added
Source: https://writers.stackexchange.com/a/3753 License name: CC BY-SA 3.0 License URL: https://creativecommons.org/licenses/by-sa/3.0/
#2: Initial revision
Look for an agent. Don't give up until you've exhausted everybody who's a good fit. And look beyond Australia. Be sure you're querying agents that actually represent the type of book you're trying to sell. Google found me a [list of agents who represent biographies](http://www.writewords.org.uk/directory/level2_pages.asp?subtypeid=81); you could start there. Another great way is to look up books similar to what you're writing, and check if they had an agent representing them (who is open to submissions). I'll add that [my first name, chosen at random](http://www.sheilaableman.com/page5.htm) asks for sample chapters right with the initial query, so I don't think the "no previous publication" barrier is as insurmountable as you've made it out to be. **Publishing online is a mistake.** That keeps him from being able to sell first publication rights; that can be a total and immediate deal-killer unless his blog is astoundingly successful. Again, since I think you've still got a good shot with an agent and publisher, then blog-publishing is an act of desperation. Damage-control as much as you can, if you're still hoping to land a publisher.