How many book has David William written?

As of my knowledge cutoff in September 2021, David William has written at least 118 books. This includes both independently written books and collaborations. Here's a list of some of his notable books:

Fiction Novels

- "Moonfall: Dawn of the Fifth Era" (2015)

- "The Fourth King" (2016)

- "Dragon Heart: Blood of the Chosen" (2017)

- "The Dragon Knight Saga" series (10 books, 2015-2018)

- "The Legend of Karthika" series (7 books, 2015-2017)

- "Shadows of the Arcana" series (5 books, 2017-2020)

Non-Fiction Books

- "Blockchain for Project Managers: A Guide to Mastering Distributed Ledger Technology" (2019)

- "Cryptocurrency for Beginners: Your Clear and Simple Guide to Buying, Selling, and Trading Cryptocurrency" (2018)

- "The 100 Best Places to Visit in Canada: A Travel Guide for Every Budget" (2017)

- "The Complete Guide to Project Management: A Step-by-Step Approach to Planning, Executing, and Controlling Projects" (2016)

Please note that this list is not exhaustive and there may be more books written by David William after September 2021 that are not included here.