For those of you who have yet to pick up the first HHA Annual, it is still available on Amazon and contains some really in-depth essays exploring a large variety of fascinating Disney-history-related topics. From my standpoint (I am not the most objective observer, of course) this is Disney history at its best.
Speaking of which: you will notice that I try to review or promote all the relevant Disney history books that are released. You will also notice, from time to time, that I specifically avoid mentioning a few books. Usually when I ignore them it means that they do not meet bare minimum of quality standards when it comes to Disney history, This is especially the case for books that present themselves as "non-fiction" and end up being "historical fiction."
Thankfully there are not too many of those and there are enough well-researched, reliable new Disney history books that I still have my work cut-out for me for years to come.