I need some ideas for a long, downloadable e-book with about 150 pages. can anybody help me?

the book will be downloadable soon.

here are my ideas:

a book about my adventure on survival.

a book about creepers and other mobs.

a game guide.

and a book on how to protect your house from mobs.

I will put up the people who give me the ideas usernames on this page when the book is finished.

Additional Notes