This game seems to be a good alternative for players who like slots provided with just 5 paylines since it is equipped with a quite active wild symbol and additionally with two interesting bonus rounds.
One feature is triggered with three “book” scatters and the other with three “bull” scatters, both symbols may appear located in any position on the reels and both features are a round of 10 free spins that differ only by the extra feature attached to each kind of round.
In book bonus round, any of the symbols is randomly selected and this symbol, during the free spins, will expand through the entire reel and will form lines regardless of whether the other matching symbols are located or not on adjacent reels. This feature is very common in other slots manufactured by Bally, Bally Wulff, and Merkur, and it has always seemed to me a very strong feature and also very appropriate to be used on slots provided with as few lines as this one.
For its part, the bull bonus round has attached an extra feature uncommon in slots of this type, which is more specifically a “sticky wilds” feature, where every wild symbol that appears remains frozen in place until the end of the round, and in this slot, it seems this feature has a quite acceptable performance.
My first experience with “Books & Bulls” was moderately positive, I certainly think that sticky wilds make this video slot a more interesting game because I personally am quite used to play very similar slots where it only occurs the feature about the special symbol in the book; however, I have the impression that in “Books & Bulls” I usually get fewer lines of 5 of a kind that in other five paylines slots, although to be fair, I think this is a too abstract observation because events like these rely heavily on our luck at some specific time.
So I think the best thing I can do is invite other players to try this game out, and wish them good luck in the bullfight.