A Conspiracy in Belgravia by Sherry Thomas

The second volume in the Lady Sherlock Series wherein our heroine, Charlotte Holmes, who masquerades as her ‘sick brother’, Sherlock, solves cases both important and mundane with her superior wit, observation, and deduction.  In this case, Lady Ingram, the wife of a man that Charlotte secretly loves, comes to consult with the detective about her own lost love.  A man whom she was unable to marry because he was unsuitable to her parents.  Once a year, they pass each other by at a specific place in the park.  But this year, he did not appear.

Ingram’s brother, also a Lord, proposes to Charlotte and gifts her with a set of mysteries to solve.  She solves all but one upon reading them.  The extra one takes days of working ciphers.  She runs into a detective from Scotland Yard who has a corpse to examine and find the murderer.  The corpse’s coat has a braille message in the back of it.

These cases entwine in unexpected ways that lead to extreme changes in people’s lives.