Return to Titanic Series by Steve Brezenoff

On the first day of their spring break, best friends Tucker and Maya discover a ""Special Collection"" of Titanic artifacts at the local museum. But the artifacts have more power than they know. When they touch a magic ticket, Tucker and Maya find themselves transported 100 years in the past to Titanic's maiden voyage. Now they must figure out how to save a new friend, and return to the present, before time runs out.

Best friends Maya and Tucker didn't expect to spend their spring break onboard the Titanic in 1912. But now that they've discovered a special collection of artifacts has the power to send them back in time, they're on a mission. They must travel back in time again to save their friend Liam and his parents, third-class passengers onboard the Titanic, and change history. Can they convince the captain to change the course of the doomed ship before it hits the iceberg?

After Tucker and Maya are jolted back to the present by Titanic's iceberg collision, they don't know what will happen to their new friend, Liam, who is still trapped onboard. They travel back to 1912 again to make sure Liam and his parents, all third-class passengers, make it to the lifeboats in time. But none of the passengers seem to realize the severity of the situation. Tucker and Maya must convince everyone that the unsinkable ship is sinking, and find Liam, before it's too late.

With Titanic already sinking, Tucker and Maya are frantic to get back to 1912. The two friends travel back to 1912 one last time and join the survivors in the lifeboats as they wait and hope for a rescue. In a twist of fate, their final interaction with Liam teaches them a piece of their own history as well.