The Book Of Ra slot is very popular in Europe but I've never seen it - or any Novomatic slots
for that matter - in Vegas which I find a bit odd. Maybe I just haven't looked hard enough.
Anyway, The Book Of Ra is what I'd term a "cult classic". It is very, very volatile
but has a once-unique "expanding scatter" feature, accompanied by 10 free spins which can pay
out handsomely.... or craply, depending on your luck LOL.
The same feature is also available in Novomatic's Lord Of The Ocean and has even been copied by online slot game manufacturers like Playtech for their Rome And Glory and Panther Moon games. You have to have a good bankroll to win on Book Of Ra and these types of game and treat them with some respect but they are great when they are on-song.
Novomatic followed up this original version of Book Of Ra with the Book Of Ra Deluxe which is also available to play online and is IMO a better game - same thing but just looks and feels a bit more up-to-date. Novomatic's "Deluxe" games are generally the same as the originals but have 10 paylines - Dolphins Pearl Deluxe and Columbus Deluxe are two more games that back this up.
Other popular Novomatic games include Sizzling Hot Deluxe and Roaring Forties which are both especially popular in LatAm countries where they appear on Novostar machines.
There is a lot more information on the Book Of Ra site, not only on this game but a load more Novomatic slots that you can play online.