Since this was published in 2002, and there has been a gender revolution and a redefinition of bisexuality (from "attracted to men and also to women" to "attracted to their own gender and also to other genders"), this book is in need of revision, or needs processed with the understanding that intersex people and non-binary gender identities are not part of the discussion, and the presentation of bisexuality is in a problematic, binary way. Ironically, the language itself can foster bi-erasure when it says a person had a "gay" relationship, etc.. No bi+ person can have a gay relationship because our orientation isn't defined by our partners' genders, and we are bisexual+ in all our relationships.
After that disclaimer, I will say it was interesting to read about historic figures who have been proven or assumed to be bisexual+. Some of the little bios focused mainly on career or life story and very little on the discussion or proof of their orientation so much that after reading several of them I thought we needed more proof to actually put this person on the list. Additionally, the list is pretty sparse after mid 1980s, and there are surprisingly few modern celebrities and public figures being discussed.
If a reader wants an up-to-date discussion of bisexuality+ and historical people who are, I recommend looking elsewhere.