Need books to kill time at Job.

Hi, so i recently got my first job as a network support engineer and it's an operations based job meaning that i'll only have to respond to anything if something happens to the network other than that its preety much boring stuff ( 4,5 hours out of 8 ) but due to companys policy I cant bring my laptop with me and watch movies or youtube. so the only form of entertainment i can engage in is books.

so i need book recommendations as a first time reader, book should be interesting fiction/non fiction does not matter, No NSFW books please. preferably a book/novel that is a conversation between people.

for a referance the only books i've ever read are my university course books

thank you