It's here! The fourth volume of Richard Pask's projected five-volume Logical Checkers series, entitled Checkers for the Three-Move Expert: Balanced Ballots is available to download in PDF format here or from the "Richard Pask" page as linked in the right-hand column. Of course, the book is completely free of charge, as are all the ebooks in the series.
Volume Four provides in-depth coverage of selected endgames, advanced tactics, mid-game landings, and of course balanced three-move ballots. The book is over 200 pages in length, with many examples, illustrative games, and diagrams.
Looking forward, we anticipate seeing Volume Five as early as the end of 2020, with a mammoth print volume of the whole series projected for later on in 2021.
Our thanks go to Grandmaster Pask for the opportunity to publish his works, and for his generosity in providing them gratis to the world-wide checker-playing community.
As a teaser, here's a position found in the book.
For the solution, see page 123 of Richard's new book.