This may be on me. I went into this book with a fair amount of skepticism. I find "tribute" writing to be wildly uneven. (That said, I loved Pride and Prejudice and Zombies.) I often end up thinking, hey, just read the source material. And for the most part, that's how I felt about Reader, I Married Him, which riffs off the famous line from Jane Eyre.
Which is not to say I didn't enjoy some of the stories. In general, the more the writer branched out from Jane Eyre itself, the more I liked the story; my favorite was Elizabeth McCracken's endearing tale, Robinson Crusoe at the Waterpark, which involves a gay couple taking their 4-year-old son to a Galveston waterpark, which leads to the older man in the relationship reassessing his life and love. It's smart, funny, and tugs at the heartstrings in unexpected, very welcome ways. Evie Wyld's Behind the Mountain is another story that treats the famous line as a starting point for an entirely different story, and it too is wonderful. But there are others that labor to recreate Jane Eyre, and those are less successful, because--well--Jane Eyre. Go read Jane Eyre.
So, hit or miss for me. YMMV.