Json path to extract based on particular value

I have scenario in gatling where i need to extract particular JSON value. For eg: I want to extract author of book title “Sayings of the Century”. I am using following Jsonpath $..book[?(@.title eq 'Sayings of the Century')]. But its not returning me anything. Can you tell me how to achieve this.

{ “store”: {
“book”: [
{ “category”: “reference”,
“author”: “Nigel Rees”,
“title”: “Sayings of the Century”,
“price”: 8.95
{ “category”: “fiction”,
“author”: “Evelyn Waugh”,
“title”: “Sword of Honour”,
“price”: 12.99
{ “category”: “fiction”,
“author”: “Herman Melville”,
“title”: “Moby Dick”,
“isbn”: “0-553-21311-3”,
“price”: 8.99
{ “category”: “fiction”,
“author”: “J. R. R. Tolkien”,
“title”: “The Lord of the Rings”,
“isbn”: “0-395-19395-8”,
“price”: 22.99
“bicycle”: {
“color”: “red”,
“price”: 19.95

The correct syntax is ==, not eq.