Good book for an introduction to differential equations

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I've looked at differential equations, but nothing past what you would learn in Calculus I and II (slope fields, separation of variables, etc.). Is there a good book out there which provides a comprehensive introduction while not being too superficial? I checked out some other questions like this one and found Differential Equations With Applications and Historical Notes, which looks very cool, but I just want to make sure it is the best one to get before I get it. Thanks!!