How far can depression level up?

I came across a book written by a Nigerian about how joblessness, family pressures of not marrying and getting a job made her attempt suicide.

https://okadabooks.com/search?term=Edge+of+suicide+

She locked her room door while everyone was home, planted a chair underneath the fan and switched it on...Isnt life more precious than death? This book is recommended for those depressed. Let's reduce the rate at which people take their lives. Have read it. Get for a friend or family member. I still wonder Why do people Hunger to take their lives?
How far can depression level up.