Strong Like The Sea Wendy S Swore by Wendy S. Swore instant download after payment.

Twelve-year-old Alexis was born in Hawaii and loves exploring her island paradise, but she's afraid of the ocean, actually—afraid of the various creatures who live in it. She still remembers the day a viper moray eel, looking like a monster, startled her when it popped out of a coral reef. When she tried to swim away, she got caught in a riptide until her dad rescued her. Now, even when her friends are surfing and swimming in the ocean, Alex watches from the beach.
Alex's mom works as a civilian contractor for the Navy. Alex thinks it's cool that her mom works in intelligence on a submarine, but her job requires her to be away from home a lot. When she's gone, she leaves codes and puzzles for her daughter and friends to solve, including a small prize.
A special birthday puzzle has a new twist—it leads Alex to visit their grumpy older neighbor whom everyone calls Uncle Tanaka, a retired marine biologist. Knowing her mom is away on an assignment, Uncle Tanaka...