So I don't like to admit this, but I'm a bit ignorant in terms of the Crusades. As a catholic I feel like I should rectify this immediately, so I'd like some recommendations on books, articles, etc. on the crusades OVERALL. Not just the first, second crusade, etc. Even if the sources are rather large, I don't much mind. I'd rather have more recent works but if there's a particular work that is older and you feel it necessary to list, go right ahead.
You might start with Caster's Sacred Violence, it's a pretty common textbook for undergraduate crusades courses. Madden's Concise History of the Crusades isn't bad either.
Fair warning, as a Catholic, you might not like what you find.
I really like Thomas Asbridge's The Crusades as a good overall account of the crusading movement. It's pretty big but that means he has the space to go into at least some detail rather than having to speed through all the events. It definitely spends more time on the first four than the later ones, but that's pretty standard as they're the biggest and most dramatic.
Jonathan Riley-Smith's The Crusades a Short History is also very good and much shorter if you just want to grab a quick introductory read. This is a good launching point for more reading on more specific parts of the Crusades if you want to just read a really quick chronological account of events to ground yourself in the basics before more advanced reading.