★ Ships Immediately ★ Brand New Latest Edition Jack 21 Advanced Math Jack21 Includes Separate Answer Booklet and Explanations Will be shipped in a waterproof package and a cardboard envelope. ////////////////////////////////////////////////////////////////////////// 《 To Buyers 》 ① For express shipping, or if you are in a hurry, please select Japan Post's Letter Pack (delivery the next day or the day after shipping). Delivery is possible the next day or the day after shipping even for remote areas such as Hokkaido and Okinawa. Before pressing the "Proceed to Purchase" button, please let me know in the comment section "Letter Pack ○○○ desired" and I will adjust the total price accordingly. Letter Pack Light (plus 270 yen, delivered to mailbox) Letter Pack Plus (plus 460 yen, handed directly to recipient) I cannot accommodate express shipping if the price cannot be changed after pressing the "Proceed to Purchase" button. ② Immediate shipping... has a time range. For nearby prefectures, even if shipped today at 6 PM, or shipped tomorrow at 3 PM, 21 hours later, the delivery date and time will be the same. I will make a judgment and take action to ensure the earliest possible delivery, so please rest assured. Except when purchasing using method ①, please refrain from messages that urge shipping. ③ I will not respond to any "price negotiation" requests, even when purchasing a single item or multiple items. I will not respond to comments asking for a price reduction. Please understand the above three points.