As you know, we don't have complete versions of the Books in the Library. Some have only 3 Chapters at present. VIPs are not in any of them (and the prospect that VIPs won't be in the Books is nil since SP would lose that cash cow). The Library Info tab says the Books record "all".
What is interesting about the anomaly is that the auto placement of monsters by the app reveals what will be in the full version of the Books.
The App isn't autoselecting completely at random. In the Mechanical slot it is selecting Timerion, Holter, Ultrabot, Skeel - monsters that are intuitively Mechanical.
And in the Female slot - Thetys, Shannara, Zyla... and others... but all female.
So - the App autoselecting monsters not currently in our abridged Books appears to reveal monsters that will be in the final, complete versions once released.
The Books will contain a rich variety of monsters once finally released.
We don't have to worry about ranking monsters we don't already have access to, like ROFL. Favourites like Timerion and obtainable monsters like Holter will be there.
SP is very foolish to start a Book restrictions war without first releasing the complete books - players will despair at the (false) impression that they need to rank eg ROFL to compete. Players will quit, and a lost customer is not easily regained.
This is a cynical marketing ploy to get us to buy monsters we ultimately won't need and don't want.
Book restrictions, once the Books are fully released, will be a breath of fresh air and a LOT of new tactical elements will come into play.
A word of warning: although the app apparently selects from the complete books - we can't. If you try to change your monster you will find you can only choose from the incomplete version of the Books currently in our Library. So if the app gives you Thetys, you may want to leave it rather than be forced to place your level 100 Lau Lau....