Alpha Singapore has two books that are useful resources to help you handle all those tough questions being asked in your small group discussions on various subjects such as The Trinity, the Holy Spirit, other religions, church practices or suffering:

Searching Issues by Nicky Gumbel

• From the chapter on The Trinity: The doctrine of the Trinity is highly relevant because it sheds light on the nature of God and his interaction with his creation.

• From the chapter on Sicence and Christianity: God has revealed himself in both creation and supremely in Jesus Christ, as witnessed to in the Scriptures. Science is the study of God's general revelation in creation. Biblical theology is the study of God's 'special' revelation in Jesus and the Scriptures. ... The evidence of science may point to the existence of God. But without the special revelation of Jesus Christ as witnessed to in Scriptures, we would have known little about him. 

Frequently Asked Questions about Christianity By Then Chee Min

Who made God? Isn't sin a relative concept? How will I know if the voices or dreams are from God, not demons? Why are some people not healed after prayer? Why must I be baptised? 

These are some of the 51 questions asked and answered in the book that addressed the questions many pre-believers have about Christianity.

Not only is it a handy resource for small group discussions, it is also useful read for any seeker on an Alpha Course who may not have had the opportunity to ask the questions that they've always wondered about.