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Book of Sun (3 Oaks Gaming (Booongo)) – Review & Demo Play
Book of Sun from 3 Oaks Gaming (Booongo) play free demo version ▶ Casino Slot Review Book of Sun ✔ Return (RTP) of online slots on July 2026 and play for real money✔
Pros
- 96.8% RTP is fine for casual play
- Twelve free spins with possible retriggers
- Simple 5x3 layout and fixed paylines
- Low volatility gives more regular line wins
Cons
- Egyptian theme feels very familiar now
- No multipliers or extra side bonus
- Reel stops feel a bit abrupt
- Bonus does not land often enough
My simple test of Book of Sun
Book of Sun is a 5x3 Egyptian book slot from 3 Oaks Gaming, with 10 fixed paylines and a familiar Book symbol doing the main work. hello all, I just wanted to share my thoughts after giving it a fair run. The layout is easy enough to follow if you're new to it, but the reel stop after about 2 seconds feels too sharp.
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Reading the paytable
Symbols pay left to right on the fixed lines, and the top regular symbol is the Pharaoh at 500x for five. Horus is next at 200x, then Bird and Scarab both reach 75x. The lower card symbols are 10, J, Q, K and A, with the weakest ones topping out at 10x or 15x.
Premium symbols can pay from only two matches, which helps the low-volatility feel. The Book is both Wild and Scatter, so it can help regular line wins and also trigger the bonus. I like that the paytable is clear, but the Egyptian set is very standard now, with no unusual symbol twist in the base game.
Symbols and payouts
| 5 | x500 |
| 4 | x100 |
| 3 | x10 |
| 2 | x1 |
| 5 | x200 |
| 4 | x40 |
| 3 | x4 |
| 2 | x0.5 |
| 5 | x200 |
| 4 | x20 |
| 3 | x2 |
| 5 | x75 |
| 4 | x10 |
| 3 | x3 |
| 2 | x0.5 |
| 5 | x75 |
| 4 | x10 |
| 3 | x3 |
| 2 | x0.5 |
| 5 | x15 |
| 4 | x4 |
| 3 | x0.5 |
| 5 | x15 |
| 4 | x4 |
| 3 | x0.5 |
| 5 | x10 |
| 4 | x2.5 |
| 3 | x0.5 |
| 5 | x10 |
| 4 | x2.5 |
| 3 | x0.5 |
| 5 | x10 |
| 4 | x2.5 |
| 3 | x0.5 |
How the bonuses trigger
Free Spins start when 3 or more Book symbols land in the base game, and the round gives 12 free spins. At the start, one regular symbol is selected as the special expanding symbol. During the feature, enough of that symbol in view makes it expand across its reels, and it pays even when the symbols are not adjacent.
Retriggers are possible, because 3 or more Books inside the feature add another 12 free spins with the same special expanding symbol. That part is the main reason to try it, but the bonus doesn't land often, just so you know. Also, the Book Wild does not replace the special expanding symbol during the free-spins round.
Bonus features
By the numbers: Book of Sun
Numbers are friendly for a casual player, with 96.8% RTP, low volatility and a 5,000x max win. The RTP is fine for a casual spin, and smaller line wins appear more regularly than in many high-volatility book slots. I would still keep stakes steady, because the better results depend heavily on landing Free Spins and getting a decent expanding symbol.
FAQ
Why can the Book miss the expanding symbol?
How many extra spins does a retrigger add?
Which symbols pay from only two matches?
Do expanding symbols need adjacent reels?
What changed in Book of Sun: Multi Chance?
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Gallery of video and screenshots of the game
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References
Our editorial team
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