When my sons were little, we used to love reading I-Spy books. In these lovely visual mysteries, young readers would be offered details to find in a very cluttered visual--perhaps a junk drawer or a circus tent or a picnic blanket--and they had to try to pick the sought-after items out of the jumble of things that had no importance.
This is analogous to the mystery, and the way that real clues sit beside red herrings. The reader is expected to discern the important details.
As a little pre-publication I-Spy, I'm sharing some images that will be significant in DEATH IN A BUDAPEST BUTTERFLY. Hopefully they look enticing enough for you to check out the book. You can find out more here.