We sell variety of engineering books and reviewers. Just pm lang po the author, edition and title ng book na need nyo if indi po nakapost sa shop. FAQ: 1.) Pwede po ba ang COD? -Pwede as long as pagcheck out nyo po, merong CASH ON DELIVERY sa payment option. If wala, you need to pay first shopee so that we can process your order/s. (No need to worry, money remited will go directly to Shopee, indi po samin---it will only be remitted once you confirm na received na ang items.) 2.) How many days po before mag arrive? -This actually depends sa courier po na pipiliin nyo. #engineering #engineeringbooks #engineeringbooksforsale #booksph #booksforsale #booksforsaleph #booksale #integralcalculus #mechanics #surveying