Good news everyone! Between now and October 9th, Rune pages are buy one get one free - for the normal price of 6300 IP and 590 RP you'll get two pages!
"Here at Riot Games we know the value of a good book – especially if that book happens to be loaded with powerful arcane runes. So to help you get the most out of your seals, marks, glyphs and quintessences, we're holding a sale on rune pages.
Between October 2nd and October 9th you'll receive two rune pages for the price of one on purchases made with either RP or IP.
You'll find rune pages in the Other tab of the League of Legends store, so don't miss this chance to bolster your book while they're on sale."