'This dog never forgets a friend. When their friend Lucky is kidnapped by elephant poachers in Tanzania, the Global Rapid Reaction Responders team is called in to find him. Caesar the super-sniffing war dog is sent with Ben and Charlie on the mission. After a death-defying parachute jump into the ocean, they start gathering clues. The poachers were last seen stealing village children to become soldiers for their army and they have forced Lucky to write a ransom letter. If the team can trace the letter, and work out which way the rebels went, they might be on the right track. Saving Lucky from the heavily armed poachers is their top priority, but the GRRR team is prepared to do whatever they can to stop the cruel trade in elephant tusks and to free boy soldiers. Can Caesar's nose locate the illegal cargo and trace and rescue a good friend before it's too late? A battle on the African plain is about to erupt.' (Publication summary)
'Explosive detection dog Caesar is in Texas with his handler, Ben, to train the local police. When a bomb detonates nearby and Caesar sniffs out a second bomb at the scene, he attracts the wrong kind of attention.
'Mexican crime lord Carlos Marron, known as the Green Parrot, decides that the world-famous labrador can protect him from the kind of bomb attack that targeted his brother. Carlos orders his subordinates to dognap Caesar - and when Ben leaves Caesar in quarantine, the gang swoops.
'Now, Ben, Charlie and the GRRR team have to locate and rescue Caesar in Mexico, in the middle of a deadly crime cartel war.' (Publication summary)
'When Sergeant Ben Fulton's family joins him on a cruise ship holiday, Ben, Josh, Maddie and Nan travel in luxury among the islands of the Caribbean while Caesar is in quarantine.
'But a gang who have broken out of a Cuban prison have other ideas. They hijack the massive ship and hold its three thousand passengers to ransom.
'With passengers of all nationalities in danger, only the United Nations can step in to help. Ben's best friend, Charlie, and the rest of the GRRR team assemble. Charlie will need super-sniffing explosive detection dog Caesar with him as he parachutes in to sneak aboard the ship.
'Will Caesar and Ben be reunited in time to find the hidden explosive devices that threaten the ship? Can Operation Black Shark capture the modern-day pirates before it's too late?' (Publication summary)