I found it takes a weird turn after 2/3 or so that made me dislike it but maybe that is just me 30 years ago, and I only read it once. It reminded me in a way o

I found it takes a weird turn after 2/3 or so that made me dislike it but maybe that is just me 30 years ago, and I only read it once. It reminded me in a way of Life of Pi. It starts as one type of book and starts morphing.