Seventh-Day Adventism is one of the more extreme formulations of Christianity, whose less attractive elements include creationism and the weird idea that judgement of souls began in 1844. In reality, the most significant event of 1844 was probably the completion of Mendelssohn's violin concerto
I am also amused by the coincidence that the author of this book, Ellen White, shares her name with one of England's top women footballers.
More generally, however, Rafka is acting in accordance with the Great Commission with these posts of his, and in a non-denominational sense I support him. But instead of 7DA, you might like to check out Anglicanism, which is more sensible and credible; catholic AND reformed, it is the "middle way" that gives you the best of both worlds of Catholicism and Protestantism. If you're dissatisfied with a meaningless hedonistic and depressive life, open your mind and give Jesus a chance. And remember that God is not "a big man in outer space" (or "an object among objects" to use Aquinas's phrase) but the basis and foundation of existence as we know it, objective AND subjective. Don't go to science for explanations here, because this only deals with objective reality.
In terms of books to read, I read this one last year and thought it was very good. I don't know if a free e-version exists, but here it is:
https://spckpublishing.co.uk/how-can-i-believe
