Submitting my novel Soci of Metro to UK literary agencies was a long process. Between compiling a list of agencies, determining whether they accepted speculative fiction, and preparing a synopsis and cover letter, I was also working on a "final" fourth draft of the novel.
I sent off my submissions, and had a few requests for the full manuscript, a few queries regarding the novel's content, a few emails offering constructive feedback. But they all led to rejections.
As of writing this post I'm still waiting on seven out of twenty-six agents to respond. I've sent several follow-up emails since submitting in the autumn of 2016, and I'm getting closer to accepting that they might never respond at all.
But that's okay, because I have a Plan B: American agencies.