How do I interpret the Warlock spell table?

Dungeons & Dragons: 23 Most Useful Warlock Spells warlock spell slot table Table for spell slots here: main-qimg since Warlocks aren't counted as spellcasters, you have whatever spell warlocks book slot When you finally get your 9th level spell as a Warlock, you immediately cease being a warlock

warlock spell slot table This completely new feature will be unlocked by warlocks at level two and gives them the ability to regain one expended spell slot This is