If you are actually interested in learning about the event and you are skeptical if this book, then you should look at Qiao Collective’s reading list: https://www.qiaocollective.com/education/tiananmenreadinglist

One more, because I don’t think anyone else posted it, is Qiao Collective’s reading list on the e event. It’s a lot of reading but the sources are pretty good: https://www.qiaocollective.com/education/tiananmenreadinglist