Meta means that the book is self-aware - it knows it's a book, it might even adress you, the reader, directly.
Some examples:
We are in a Book - Mo Willems (children) The Book With No Pictures - B.J. Novak (children) The Eyre Affair - Jasper Fforde (adult) The Princess Bride - William Goldman (teen/adult) The Neverending Story - Michael Ende (middle grade/teen)
Today we finished Finding Serendipity by Angelica Banks, which was in the We Need a Shero! reading crate. Super cute adventure story about a girl who is braver than she realized.
Some examples:
We are in a Book - Mo Willems (children)
The Book With No Pictures - B.J. Novak (children)
The Eyre Affair - Jasper Fforde (adult)
The Princess Bride - William Goldman (teen/adult)
The Neverending Story - Michael Ende (middle grade/teen)