she said the book is interesting对不对?she said the book is interesting （表示这本书不管过去现在将来都很有趣?）she said the book was interesting （表示这本书过去很有趣?现在有趣没趣不一定?）这样对吗?

she said the book is interesting对不对?she said the book is interesting （表示这本书不管过去现在将来都很有趣?）she said the book was interesting （表示这本书过去很有趣?现在有趣没趣不一定?）这样对吗?
she said the book is interesting对不对?
she said the book is interesting （表示这本书不管过去现在将来都很有趣?）
she said the book was interesting （表示这本书过去很有趣?现在有趣没趣不一定?）
这样对吗?

she said the book is interesting对不对?she said the book is interesting （表示这本书不管过去现在将来都很有趣?）she said the book was interesting （表示这本书过去很有趣?现在有趣没趣不一定?）这样对吗?
第二个是对的.
宾语从句时态随着主句走,主句的said是过去式,所以宾语从句也用过去式was.
宾语从句只有在表示客观真理,公理等的时候,才用一般现在时,不随主句时态走.
这本书有趣不是真理,这只是主观的判断,所以第一个错误.

完全可以这么理解。