Benjamin Franklin Gates and Dr. Abigail Chase re-team with Riley Poole and, now armed with a stack of long-lost pages from John Wilkes Booth’s diary, Ben must follow a clue left there to prove his ancestor’s innocence in the assassination of Abraham Lincoln.

Scouring the ocean depths for treasure-laden shipwrecks is business as usual for a thrill-seeking underwater adventurer and his wisecracking buddy. But when these two cross paths with a beautiful doctor, they find themselves on the ultimate treasure hunt.

Though she can spin wild tales of passionate romance, novelist Joan Wilder has no life of her own. Then one day adventure comes her way in the form of a mysterious package. It turns out that the parcel is the ransom she'll need to free her abducted sister, so Joan flies to South America to hand it over. But she gets on the wrong bus and winds up hopelessly stranded in the jungle.

Joan Wilder is thrust back into a world of murder, chases, foreign intrigue... and love. This time out she's duped by a duplicitous Arab dignitary who brings her to the Middle East, ostensibly to write a book about his life. Of course he's up to no good, and Joan is just another pawn in his wicked game. But Jack Colton and his sidekick Ralph show up to help our intrepid heroine save the day.

Treasure hunter Ben 'Finn' Finnegan has sunk both his trusty boat and his marriage to Tess in his obsessive quest to find the legendary 'Queen's Dowry' treasure. When he finds a vital clue that may finally pinpoint the treasure's whereabouts, he drags Tess and her boss along on the hunt. But Finn is not the only one interested in the gold—his former mentor-turned-enemy will stop at nothing to beat him to it.