Miles. The House of Bannerman, #1

Lost treasure. A missing heir. A 144 year old mystery. An innocent guy, trapped by false accusations. An unscrupulous villain, who will stop at nothing... Nineteen-year-olds Anika Riley and Miles Bannerman have been best friends since the day she fell through the rotten cellar doors, and into the abandoned House of Bannerman castle-like estate. They belong together and would stay together... if that was an option.
But Miles isn't like other guys. He's stuck in semi-transparent mode, unable to leave his family home. Miles doesn't believe evidence exists to clear his name from the 144 year old false accusation that has him trapped, but an answered prayer convinces Anika that it does. Anika learns of a plot to take control of the estate from the current trustee, and it's a race to prove her friend innocent before she's banned from the estate, and his last hope of ever being set free is destroyed.
The price Anika must pay in order to free Miles is higher than she can bear, but to leave him trapped and alone is unthinkable. She must make a choice. Her decision results in a chain reaction that no one could have foreseen, but there's no going back. and nothing will ever be the same again.