"""I recommend taking a look at linguist Arika Okrent's book "Into the Land of Invented Languages"""

I used to have that book... I didn't think it was very good. I wanted to learn more about the various conlangs, but instead the author mostly focused on their creators, and then especially their idiosyncrasies and quirks.

For those who want to know more about conlangs, I would recommend "The Language Construction Kit" by Mark Rosenfelder.