I sent out 8 agent query letters on January 9th. I received on rejection and submitted to another agent, who in turn, rejected me as well. Both of these rejections were based just on the query letter. So I'm remaining positive for the other 7 query letters as they all include chapter samples. I can console myself in that the two rejections had nothing to do with my actual writing.
I'm resisting the temptation to spend any time tweaking the query letter. I compare my novel, Spirit Quest, to Jim Butcher's Dresden Files and Kevin Hearne's Iron Druid Chronicles. They're both urban fantasy series that are very similar, although I feel that my story and hopefully series will be a bit more rural fantasy.
At first I had compared my story to F. Paul Wilson's Repairman Jack as my protagonist would be going around and helping people with his spirit magic. Although we both wrote our stories in the 3rd person point-of-view, Spirit Quest, is also a kind of coming of age novel. That 3rd person point-of-view was important, especially with my strong supporting cast. Tara could easily be the story's co-protagonist, but I'm saving that for the sequel.