The book Life Everlasting in Freedom of the Sons of God
Am I the only one who thought that was a really awkward title? What does it even mean?
As for predicting the time of the end, it's such a common thing throughout the history of Christianity that it boggles the mind. The very book that they venerate as being inspired by God tells them (the words coming from God Himself!) that no one else knows the day or time and that no one should even be worrying about the day or time!
The whole idea was for believers to remain steadfast in their faith and not waver, for fear that the day of judgment might be upon them unexpectedly. Now, that itself can seem pretty cruel, but the fact is that it is laid out very clearly. Yet for centuries, men have tried to come up with specific dates for the end. It's insanely tone-deaf.