# Minastik > Minastik is an AI/LLM and digital-transformation company. This file points AI assistants to > Minastik's openly available learning material. ## Learn - [Recommender Systems from Zero](https://minastik.com/recsys/): a free, hand-checkable, from-zero handbook on recommender systems (linear algebra to graph- and LLM-based collaborative filtering). Full content map: https://minastik.com/recsys/llms.txt - (add learning notes, books and articles here as they ship) ## Reference - [Recommender Systems from Zero — Zenodo (DOI 10.5281/zenodo.20952963)](https://doi.org/10.5281/zenodo.20952963): citable PDF + metadata, CC BY 4.0.