I'm currently reading A Christmas Carol Murder by Heather Redmond. This book is the third in the Dickens of a Crime Mystery series.
An evening of Christmas caroling turns tragic when Charles Dickens and his friends witness a man plummet to his death from a second story window. While Kate doesn't believe the old man physically capable, Charles is convinced that the disagreeable homeowner is a murderer. Charles is keeping busy trying to work on his book, find a good home for an orphaned baby, and help a growing mudlark, but when the body of the dead man disappears, the situation has the makings of a novel!