Abie Longstaff <br/><br/>
The Trapdoor Mysteries The Lost Treasure 

 - UK  2019 
<br/><br/> Young Adult: 13-18 yrs 
<br/><br/><label>ISBN: </label>9781510104266 
<br/><br/><label>Subjects--Topical Terms: </label><br/>code- breaking<br/>secret library<br/>servant girl
<br/><br/><label>Index Terms--Genre/Form: </label><br/>1.Fiction