Dinosaur cat

"In Arizona, bookseller Penelope Warren and her cat investigate the murder of a woman paleontologist. She was shot while sifting sand in search of dinosaur fossils."@en
"A young scientist is found murdered at a paleontology site and Penelope Warren and her twenty-five pound cat are called in to solve the crime."
"The death of a leading paleontologist sends feline detective "Big Mike" on the trail of an eccentric cast of foreigners, none of whom seem too willing to give Mike or his owner Penelope Warren many answers."
"Arizona. When the discovery of a baby Seismosaurus fossil attracts a horde of media vultures to Empty Creek, Arizona, the incredible find is overshadowed by an even bigger sensation: a young scientist is found murdered at the site. Local folks know by now that the likeliest person to solve any crime is Penelope Warren, ex-Marine, mystery bookstore owner, and occasional sleuth - aided by Mycroft aka "Big Mike," her 25-pound Abyssinian alley cat."