A Kiss Across Time by Louise Allen

Murder – and a love across time.

21st century Special Constable Cassie Lawrence has already been propelled through time to London in 1807 after an impulsive purchase in an antique shop. Now the same inexplicable force has sent her back again – into the arms of Lucian Franklin, Earl of Radcliffe.
Cassie is more than happy to be there – but Lucian and his brother James are embroiled in the murder/suicide of two of James’s friends, members of London’s secretive gay community who have the threat of the gallows shadowing all of them.
With James in danger and blackmail, spies, politicians and a High Society gynaecologist in the mix, Cassie must help solve a crime and somehow come to terms with a love affair across two hundred years.