0 middle-grade-adventure-sand-mystery-excitement-intrigue-book-cover-ideas-with-glow-map-pendant-leather-strap-seaside-cliff-teen-boys-shadowy-thugs-8d6ca4d42a The close-up of the ancient stone pendant with a subtle mystical glow in the foreground immediately captures the reader's attention and sets the tone for an adventure-filled story. The seaside cliff with the teens scaling it in the background adds a sense of excitement and danger. The bold and slightly distressed font used for the title gives it an ancient and adventurous feel, while the playful font for the subtitle appeals to the middle-grade target audience. The matte paper stock enhances the overall aesthetic by giving the cover a slightly aged and weathered appearance, adding to the intrigue of the story.