A new Digital Monograph Costing Tool from American University Presses.

My digital monograph costing tool:—

Research and write the thing: mostly free, just buy a few print books.
Microsoft Word, already have it: free.
Proofreading, can DIY: free.
Lulu.com, for distributing print-on-demand print copies: free.
HTML editor, for making an e-book from the Word file: free.
Amazon Kindle Store, for distributing an e-book: free.