YOU SAID:

My favourite book to read is a book that you don't know

INTO JAPANESE

私の好きな本を読むのか分からない本は、します。

BACK INTO ENGLISH

I don't know I like to read books.

INTO JAPANESE

私は本を読むことが好きか分からない。

BACK INTO ENGLISH

I don't know what I like to read books.

INTO JAPANESE

私は本を読みたいか分からない。

BACK INTO ENGLISH

I don't know if I want to read the book.

INTO JAPANESE

本を読みたいかどうかは私は知らない。

BACK INTO ENGLISH

I don't know whether or not you want to read the book.

INTO JAPANESE

本を読みたいと思うかどうか私は知らない。

BACK INTO ENGLISH

I don't know whether or not you want to read the book.