The Frost Fair, by Edward Marston

This is a volume in Marston's series that follows Henry Redmayne, architect, who is helping to rebuild London just after the Great Fire (in 1666). In this one, his brother is accused of murdering his former fencing instructor and thrown into Newgate Prison. Also, Henry has developed a relationship with a young woman, which is placed in jeopardy because of his brother's arrest. He must clear his brother's name as well as his own while continuing to pursue his career.

Which, of course, he does, with help from his Puritan friend, Jonathan Bale. Fun.