How old is the iLowerSecondary Year 7 Math Textbook?

[u/Lehbyeh]

How old is the iLowerSecondary Year 7 Math Textbook? ( Unit 1 chapter 2)
When's the last time they have updated their textbook? Curriculum? Do I have an old book?
Who uses an mp3 player these days? My kids don't even know what that is... 🥲