Cindy, the standard text is Bertrand Russel's "History of Philosophy". I haven't read the whole thing for a long time, and at about 900 pages it's a daunting task. It's well and clearly written, but what you're getting is Bertrand Russel's view of these philosophies. He makes no pretense of trying to provide any kind of "neutral" analysis. That's fine with me because I'm in sympathy with a lot of his ideas, but it has to be kept in mind.
I haven't read "A Little History of Philosophy" by Nigel Warburton, but it seems more accessible.
I have other books on philosophy on my shelves, following my changing opinions over the years. These might not at all appeal to you, however. I'm not a Nietzsche fan.
Marcus Aurelius: Meditations
Being and Time: Martin Heidegger
Myth of Sisyphus: Albert Camus
Existentialism and Humanism:John Paul Sartre
Reinhold Niebuhr: The Nature and Destiny of Man
In Defense of Secular Humanism: Paul Kurtz
This book meant a lot to me at one time:
Man's Search for Meaning: Viktor Frankl
I've read a lot of Hannah Arendt. I think she's very relevant to our times.