We get letters, we get stacks and stacks of letters

Is it a mixed metaphor to apply Perry Como's jingle from the fifties to emails?  Who is Perry Como you ask?  Whatever.

My novel, A Wretched Man, has been out for four months, and I'm beginning to accumulate reader's comments.  One reader even called my cell phone one morning to suggest he had just finished the book at his lake cabin, and he wanted me to know how much he enjoyed it. 

Here's a sampling of email comments:

Anna said,

I am truly enjoying the novel!  I think you did an outstanding job...