Lady with an alien
Mike Resnick
A young boy, Mario Ravelli, develops a unique relationship with the great painter and inventor, Leonardo da Vinci, particularly because Mario is a time traveler from the year 2523 A.D.

by Lexa Hillyer (2015)
From debut author and poet Lexa Hillyer comes the lyrical story of four seventeen-year-old friends who receive an unlikely chance to relive the perfect summer . . . and the devastating secret that could unravel it all.
Mike Resnick
A young boy, Mario Ravelli, develops a unique relationship with the great painter and inventor, Leonardo da Vinci, particularly because Mario is a time traveler from the year 2523 A.D.
text by Christine L. Benagh
Derek, Margo, and Moki once again go back in time and meet Samson, who is engaged in constant struggle with the Philistines for freedom for the Israelites.
Alicia Rivoli
"When a newly formed group of friends finds themselves fighting for survival, little did they know that was just the beginning. When Chloe, Megan, Jason and Zach are forced to take cover in a nearby cave from a violent storm, they find their new friend, Preston, there as well. Zach guides the group through the cave but as they go deeper strange things begin to happen and they find themselves separated in a magical kingdom surrounded by unusual people and wizards. Things get even more dangerous as they travel the kingdom in search of the city of Mere and each other. As their journey unfolds, Preston discovers that the bedtime stories he was told as a child are true and that his rightful place in time must be realized. The kingdom itself has gone under attack as Jacan, a traitor to the crown, forces his armies through the magical borders. Looking back, Preston should have recognized that it was all real. He should have seen the signs. But how could he have known?"--Publisher description.
Edward Packard
This book is the classic sequel to the first book in the series - "The Cave of Time". The reader revisits the cave of time but this time through a different entrance.The reader, inside the cave, meets a old and mysterious man who helps the reader to time travel. This time even more dangerous and fascinating adventure awaits the reader. A must-read from me!