It was fun researching how bomb-sniffing dogs are trained and their incredible ability to sniff out explosives. Here's an excerpt from the "Penumbra Database" spy thriller: Unknown to Edhi or the Dolans, a week prior, at 3am, four CI agents wearing jeans and dark hoodies emerged from the surrounding Hemlock forest surrounding the Dolan’s organic farm. A special dog accompanied them. It was an overcast and moonless night. They snuck to the back of the open U-Haul and crawled in. As one stood outside as a lookout, the three inside swept hand-held devices close to the van floor, walls and ceiling. They did the same to the canoes and camping gear. The dog sniffed items its handler pointed to. One agent held a strange-looking device that detected minute traces of radiation. In ten minutes, they vacated the truck and disappeared back into the forest, then made their way back to the quaint, Victorian-styled Riverside Inn where ‘Tracker’ was eagerly waiting for