The characters are very relatable when you get down to it. An outsider who joins a group and winds up becoming an essential part of that group. That's Fireheart. Someone who winds up falling in love with someone they're not supposed to and winds up joining his children in their mothers original home town. That's Graystripe. Someone who used to not care for the new kid eventually growing to be friends with them, love them, and have kids with them. That's Sandstorm and Fireheart. Someone whose mother disowned them after discovering an illness/disorder and that individual struggling to find acceptance but eventually finding that acceptance. That's Crookedstar. I'm sure many people have been through those or similar situations, and that's not even all the ones I could list.