Writing a book is difficult. Collaborating with others to write a book is a lot easier. Join this Community to engage with others with whom you could collaborate on writing a book.
Form a Group of your own based on shared interests and divide up the writing. A Group could be as small as one person writing the first half of the book and the second person writing the second half, or you could have a Group of 10 people writing a novel where each person takes over from where the previous person left off!
Record your areas of interest here and let others find you!