If you play a five card major system such as Standard American Yellow Card (SAYC) this book is a must. By introducing a few simple conventions but keeping most of the system the same we can solve problems with SAYC and introduce frequent new pre-empts. The secret to the system is to make the SAYC 1♣ opener forcing and instead of passing and use a 1♦ response for all 0-5 hands.
The book is suitable for Kindle Whitepaper, Kindle Fire and Kindle HD. On the original old Kindle it may be hard to read the tables. You may have to change to a small font size on due to the extensive use of bidding tables.