I finally have the space to finish a project I've been working on which is a study with 3 bookcases. So far, my idea is to have 1 with books that will always be there, such as classic reads, or even an encyclopedia maybe?, or other reference material. Basically, a permanent bookcase whether or not I've read the material. The other two will be rotated in and out of stuff that I'm reading, have read recently or on my backlog before swapping or donating.

Anyways, what's in your "must have" bookcase? Reference, fiction/non-fiction, Calvin & Hobbes even! (Although that's more of a coffee table piece)

I've been using mostly C at my current job for about half a year now, and I find myself reusing some little function that I've written for another code base in current projects. I'm relatively new to this, so I'm wondering if it makes sense to have a repertoire of general purpose utility functions and whatnot for future use.

I mean, the language's pretty established and whatever I think of must have been written by somebody else already, so is there even a need for what I'm talking about? Are there well-known open source libraries that resemble what I am talking about? Should I just include them instead of writing my own?

Sorry if this is a bit vague. General purpose as in string manipulation, debug output, buffer operations, implementations of data types not in C, etc., just to name a few examples.