This is the DataTalksClub Data Engineering Zoomcamp — a free, instructor-led 9-week educational course repository, not a deployable application. It is a hybrid collection of teaching materials: Jupyter notebooks, dlt pipeline scripts, dbt models with tests, Airflow/Kestra/Spark/streaming examples, and workshop content. The dominant character is data_research: the repository exists to teach end-to-end data engineering through hands-on pipelines over NYC taxi trip data (yellow/green/FHV in CSV/Parquet from GCS) and the Open Library API. Data flows from raw sources through dlt extraction/normalization/loading into DuckDB/BigQuery, then through dbt transformations (staging/core layers) with singular/generic/unit tests and model contracts, plus batch processing with Spark and streaming with Kafka. The course is actively maintained with cohorts from 2022 through 2027, and includes a systematic image-distrust audit that removed 64 AI-generated illustrations from lessons.