1. Introduction

2. Data

2.1. The Low-z Lyman Continuum Survey

2.2. Low-z LyC Emitters in the Literature

2.3. Other LzLCS Science Products

3. Methods

3.1. Stellar Continuum Modelling

3.2. Absorption Lines

3.3. Photon Escape Fraction from the Lyman Series and LIS Metallic Lines

4. UV Attenuation and Absolute Photon Escape of the LzLCS Galaxies

5. Empirical Results and Inferences from UV Absorption Lines

5.1. LyC Leakers Have Weak Absorption Lines

5.3. Comparison with High-Redshift Galaxies

6. Relations Between the UV Absorption Lines, Lyα, and LyC Escape

6.1. Empirical Correlations Between the HI and LIS Absorption Lines, Lyα, and LyC

6.2. HI and Metals Are Not Evenly Distributed, but Trace Each Other

6.3. The Porosity of the ISM Favors the Escape of LyC Photons

6.4. Dust Attenuation and LyC Leakage

7. Discussion

7.1. Predicting the Lyman-Continuum Photon Escape with the Lyman Series and LIS Lines

7.2. The Absorbing ISM of LyC Emitters

7.3. The LyC Escape Fraction of High-z Galaxies

7.4. Main Assumptions, Limitations, and Caveats

8. Summary and Conclusions