Hello. Would you please explain the underlined sentence?
I think it means "That's why I wrote this book." Am I right?
-----from Le Road Trip by Vivian Swift
Travel. Yes, we all do it. But some of us do it better than others.
This is where I come in.
I wouldn't call myself a travel expert, but that's just me being modest.
OF COURSE I'm a travel expert.
It's an idiom. It means: This is where my skills are needed, this is when I'm needed."
I'm not a teacher. I speak American English. I've tutored writing at the University of Southern Maine and have done a good deal of copy editing and writing, occasionally for publication.