Liana Brooks once read the book GOOD OMENS by Neil Gaiman and Terry Pratchett and noted that both their biographies invited readers to send money (or banana daiquiris). That seems to have worked well for them. Liana prefers strawberry daiquiris (virgin!) and will never say no to large amounts of cash in unmarked bills.
Her books are sweet and humorous with just enough edge to keep you reading past your bedtime.