Red Hart Magic — Andre Norton

What is the magic of the Red Hart Inn, an exquisite model of an old English inn that triggers three strange and exciting adventures back into earlier centuries for its two owners?

Chris Filton and his new stepsister Nan Mallory, both lonely and unhappy, must test their courage through three tumultuous periods of English history in this skillfully written time-warp fantasy. What they learn about themselves and each other enables them to live more fully in their own time.