One Man And One Woman by Joel R. Beeke & Paul M. Smalley

Showing how same sex marriage and same sex relationships are wrong in light of what the Bible teaches, whilst also showing how God in His grace offers hope to sinners. Christians will be better able to understand and defend why the God who created us has exclusive claims in defining what it means to be male and female and designing biblical marriage as an ordinance of creation and therefore a glorious institution that God made for His glory and our good.