I’ve been a longtime FreeBSD user. For a while I was even running FreeBSD on my main laptop and my main desktop. These days I run FreeBSD on servers and also on a Raspberry Pi.

If you are familiar with other Unix-like operating systems such as Linux, and you would like to use FreeBSD, then I think the FreeBSD Mastery books that I mentioned which I have physical copies of are useful also.

If you are not familiar with Unix-like systems at all then the FreeBSD Mastery books are probably not yet so useful for you.

The FreeBSD Mastery books are the most useful to someone who is already using FreeBSD in my opinion.