What book(s) should I read next?

I’ve always been fascinated with the idea of ufos and “aliens”. I’ve only ever listened to people discuss this topic through podcasts or interviews. I’ve recently decided to start reading up on this stuff, rather than listening to someone spew their personal opinions or relay info. I always hear about Passport to Magonia through podcasts, so that’s the first book I ended up buying. So far I’m liking it. What other book or books should I read?

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