I came to this work from Boswell's famous 'Christianity, Social Tolerance and Homosexuality', and found it quite a different sort of book - less panoramic in scope, less assertive, and somehow lacking the zealous excitement of the former work. Maybe that is just an indication of the impact 'CSTH' has had on our understanding of gay history. I would advise the general reader to read CSTH first, and - if you only read one book by Boswell - for CSTH to be it. 'Marriage of Likeness' is probably one for the more specialist library. Having said that, I found 'Marriage of Likeness' fascinating - and very relevant to the current debates of 'gay marriage' - in the way it focusses on identifying the real nature of heterosexual marriage, in order to open the way to a recognition of the true significance of same-sex unions. Finally, if you are planning a 'union' ceremony, 'Marriage of Likeness' contains an extensive selection of historic texts, with plenty of words that still resonate.