Only an avid reader knows and understands why George R. R. Martin says, "A reader lives a thousand lives before he dies". Regardless of the genre or subject, exploring different books by different authors allows you to see the world through someone else's eyes. Being surrounded by books helps broaden your horizons, explore new worlds, and obtain lessons and skills, ultimately benefitting your adulthood. And for that, a personalized library/bookshelf is essential to store your collection of tastes and ideas, as briefly emphasized below.

Helps to be systematic and organized

Undoubtedly, regularly using your personalized library or bookshelf can unintentionally make it disorderly, sowing seeds of difficulty for you to locate any book or document the next time. As a result, you develop a habit of reorganizing your library/bookshelf at regular intervals. Additionally, you unseat the specks of dust and any forms of dirt or mold. Doing so retains the appeal and freshness of a library/bookshelf in perpetuity.

Makes it easy to identify any book or document

Once you've your personalized library/bookshelf, you might as well have kept the count and genre of books you own. Consider the number of levels and segments your library/bookshelf has, and employ each with a particular genre of books or a set of documents. Possibly, you could label them in case your library/bookshelf is vast in size.

Another space to pour out creativity

Having your personalized library/bookshelf and storing your books/documents in it, aren't the only activities you're tasked with. Having your personalized library/bookshelf requires you to pour your creativity into its semblance and utilization. The appearance aspect includes choosing the appropriate color of the shelf and the wall if creating a feature wall. The utilization includes the items apart from the books and documents, and how you place them. Items could be either you use for your daily routine or a decor piece.

Economical when Multipurpose

If there isn't enough space in your home or the room size is smaller, consider having a multipurpose bookshelf. For instance, a space can be created where the bed or sofa can be placed against the wall, a shelf with an attached wardrobe closet, a shelf that can store items like ottoman chairs, a shelf designed like a chair-cum-bookshelf, etc. The list is long, but you can explore unique space-saving ideas like these on the internet. At the same time, it becomes more cost-effective than purchasing a separate item for the same.

A designated space for your moment of serenity and introspection

A dedicated space of a room or entirely a room for the bookshelves with a seating arrangement can aid oneself in deeper thinking about any aspect of life. It is the best place to escape from the chaotic modern world to a world of tranquility. If the bookshelf or the library corner encompasses the wood color representing earth, it helps to achieve groundedness.

A personal space reflecting your ideas and tastes

The personalized library/bookshelf reflects your personality, ideas, and tastes. Having said that, certain books are gifted or lent as a recommendation by another bibliophile or subject expert. This reflects the kind of people you interact with. At times, when the world fails to answer your questions, it is the library with the right books that answers them.

Refreshing the Mind

If you've already read a book, chances are you forget a certain part of it. But sooner or later in life, circumstances or events will compel you to recall them. When read again, you'll be able to extract the takeaways even more concretely than before.