The first book is about Grindelwald's relatives, who fall in love with the Sect, which is very interesting; the second book is about Grindelwald's sister, and the plot is a bit confusing; and the third book is about Grindelwald and Dumbledore's children. Recommend the first and third books, and just read the second one
The second installment of this book features an original heroine and Grindelwald, focusing on a career. Grindelwald's character is perfectly replaced by Depp's, just like the one drawn from the original work, and the emotional line is also very deep!