[gtest]

> taking existence of telos as a foundation

Not the GP, but I suspect the GP meant that Aquinas's Summa and Aquinas's Contra (his major works) starts with discussing first whether there is a god.

> are any of those books a good read for someone

I am not Catholic. I wouldn't recommend Aquinas.

However, I would recommend "reasonable faith" book by William Craig. Or if you want his lectures to listen to, you can start from his lectures on the existence of God[1]

If you are talking about how can one believe in God in an "axiomatic" way, yet still be rational and warranted, I suggest Plantinga's "warranted Christian belief" or his more popular level book "Knowledge and Christian Belief".

[1] https://www.reasonablefaith.org/podcasts/defenders-podcast-s...