Four sizes of the books are available: 1. XL (400-970pages, bigger format). One book in this set - Organic Chemistry is damaged and lacks a few final pages, including the back cover 2. L (190-390pages, bigger format) 3. M (250-590pages, smaller format) 4. S (100-250pages, smaller format) Please choose from the drop down menu. The books contain a lot of text and some graphs, old black-white photos or pictures of medicinal and chemical nature. If you have any quesiotns, please convo me! ~~*~~ Your purchase will be shipped in a nice gift wrap and packed with utmost care. ~~*~~ Please also take a look at the other items in my shop! ~~*~~ I'm happy to combine shipments :) In case of multiple purchase please ask me for the lowest shipment price. I am also happy to combine shipments with the items from my mother's shop: https://www.etsy.com/pl/shop/VintageQuiosque ~~*~~ WARNING!!! Shipment costs of items in my shop do not have TRACK AND TRACE feature included as a default! I am not responsible for items lost by post of one or the other country. If you wish to PURCHASE PRIORITY with TRACK AND TRACE you can do it under this link: https://boogiewonders.etsy.com/listing/1671030295 ~~ *~~ !!! Please note that due to the local law, I will sometimes have to close my shop for the rest of the month. I will be then opening it at the beginning of the next month (I simply cannot have sales above certain amount). If you would like to purchase some items, especially the expensive ones, please do so at the beginning of the month - to be sure I will not close the shop when you want to make a purchse. Thank you for your understanding. If the shop is closed you can always send a request - perhaps I will find a solution for you. !!! ~~~