Typos are universal in published work. There are few times I have read an entire novel and not seen at least one misused comma, misspelled word ("bass" for "base," for example), etc. May Day and June Bug have a couple, too. For the most part, typos are not distracting, especially if the novel is otherwise well-written, but sometimes they're funny. I just came across the following typo in an online mystery writing ezine, and it shows the power of little words ("as," in this case):
"The writing industry is often as difficult to penetrate as an emerging writer."
It makes us new writers sound like a pretty frigid lot, no? The ezine is otherwise fantastic, and I emailed them a heads up about the typo. The editor responded with this email, which made me giggle:
"I choose to blame my husband completely. He also put in a short story, when a cop was calling for paramedics after his partner was shot, 'Tell them to hurray.' Ahhh, typos."
As a college writing instructor for ten years, I've also seen some my share of student typos, like the paper calling for a ban on youth in Asia in hospitals, and the essay saying we needed to stop taking our rights for granite. Technically, those may be biffos and not typos because they weren't accidental. This is a good time to plug reading. Reading makes people smart.