What do you think of this book idea?

Mysteries are always great to write about, but......your plot is same old, same old........To write a mystery, you need to think about the crime, why it was committed, how it was committed and how the person gets caught.....Then fill in the blanks, with the details and characters...Hard work!!!!!!! Hard to do now a days, when every imaginable crime is shown on T.V. You need colorful characters, action, suspense and good descriptive words....If you really want to do this...take a cl in descriptive writing...it really does help....Who knows...maybe in 10 years, I'll see you on the "Best Seller" list :-))