Knights at Dawn is in a series called the Magic Treehouse.It is the second book in the series. Be sure to read the first one.
This story is about Jack and her younger sister Annie.They find a treehouse with these magical books inside. While Jack was looking in an informational book, Annie opened a knights and castle book. She saw a picture of a knight in black armor. Annie pointed to the picture and Jack dropped his book, "NO ANNIE NO'' he screamed. But it was too late Annie had said. "I wish we could see this knight in real life." She dropped the book and the treehouse started to spin and spin. When the spinning was done Jack looked out the window and already saw Annie running to the castle door.
Read the book and find out what happens when Annie meets the knight!
Here is an interview with Mary Pope Osborne talking about writing her Magic Treehouse books:
