Big Little Lies is written by Liane Moriarty. Liane Moriarty wrote The Hypnotist's Love Story
[Human]: Do you have anything similar to the book Big Little Lies? [Assistant]: The Hypnotist's Love Story is similar to Big Little Lies. [Human]: Why are they similar? [Assistant]: Both books were written by Liane Moriarty. [Human]: Can you give me other books that she has authored? 
Liane Moriarty also wrote What Alice Forgot and Truly Madly Guilty.