On a living planet, nothing lasts forever. Especially if you're limiting the number of iterations of each book to one. One book per topic (e.g. <PERSON>) per place (is that household / city / county / nation / planet?) is asking for disaster, and even more disaster as you move from left to right along that scheme!
That said, there are several time tested possibilities:
Clay Tablets
The "Assyrian National Library", sponsored by Emperor <PERSON> at Nineveh, is the oldest surviving royal library known, dating to 700BC or thereabouts. Clay is easy to write in and once fired, the tablets are sturdy. They're a pain in the backside to deal with for texts of any great length or complexity. Can last thousands of years if well cared for, or if abandoned and forgotten for millennia.
Stone
Egyptians carved literature into stone. Like clay it's durable, but is not indestructible. Like clay, it's a pain to maintain lengthy texts. Can last myriades to millions of years if protected from erosion
Papyrus, Paper & Vellum
Well known to ancients & moderns alike. 111
Easy to make & convenient to write on. Durable and long lasting. If you're people are repairing books every decade, then I'd say they are either overly abusive towards books or else don't know to bind books. A book printed on good rag paper and well bound can last several centuries without needing more than minor repairs. When well maintained, books of this sort can last many centuries: expect somewhere between 13 and 20 centuries. All these materials will eventually decay, even in the best of conservatories.
Metal
This is probably the most durable option. Books have been written on gold pages, the oldest of which are in the region of 2500+ years old. Copper / bronze, stainless steel, gold, platinum: any of these should last indefinitely under stable atmospheric conditions.
To Digitise or Not to Digitise?
Even the best digital media will find it difficult to compete with well curated books. Digital media are also heavily reliant on external factors such as electricity, computers, operating systems, stable cultures & societies just in order to be accessed & processed. Whether it's magnetic or battery supported or flash memory, digital media are not a good idea for truly long term archival of a culture's most important data.
Conclusion:
I'd recommend that the culture's most precious data --- scripture, literature, mythology, folklore, poetry and the like --- be preserved on metal plates. And also on high quality paper books bound in solid & protective hard covers.
All rapidly changing data --- scientific & technical developments, rapid advances in medicine, changes in law --- should be committed to okay quality paper.
Ephemeral data --- accounts, receipts, bills, notes and so forth --- these don't need to be archived at all and can be kept on cheap paper. 111