I have a lot of book collection too, most of them are still in the PI in my room. I guess we're the same mga thousands din. Yung closet ko na para sa clothes, are filled with books, lots of stacks of books.(I put my clothes in the outside closet we have at home) I installed shelves to stacks my books. My book collection are mostly fiction there are some Archies comic books but most of them are romance/historical romance/contemporary romance: Sweet Valley Kids, Twins, High, University, Saga, Love Stories, Harlequins, Jude Deveraux, Judith McNaught, Johanna Lindsey, Jayne Ann Krentz, Amanda Quick, Jane Feather, Catherine Coulter, Kathleen E. Woodiwiss etc. Kahit na full yung closet ko I still have books stack in a shelves sa end of my bed and my shelves beside my bed too. Some of it is on the floor under my bed kasi wala na akong space. My room in my parents house looks like a library.
When I moved, I didn't collect books that much since I can mostly borrowed the books in the library but if I really love the books and wants to re-read it I buy it. Before we have a baby, we have that one room as our library in our house. I even arrange it together with my husband's books, he's an avid reader too like me. But more on fantasy adventure. Now, all our books shelves are transfer to our guess bedroom (and it's a mess right now) bec we turn our library room to our baby room.