Today's free book is The call of the stars: a popular introduction to a knowledge of the starry skies with their romance and legend by John R. Kippax (1919). For the table of contents, check at the bottom of this post below the image.
The book is available at Hathi Trust (I have not checked for other online sources).
Table of Contents
Chapter 1. General Remarks
Chapter 2. The Night-Sky Of Spring
Chapter 3. The Night-Sky Of Summer
Chapter 4. The Night-Sky Of Autumn
Chapter 5. The Night-Sky Of Winter
Chapter 6. The Night-Sky Of Winter (Continued)
Chapter 7. The Milky Way — Magellanic Clouds — Zodiacal Light — Aurora Borealis — Green And White Nebula — Double And Multiple Stars —Variable Stars — Temporary Stars
Chapter 8. Stellar Distances
Part 2. The Sun And The Planets
Chapter 1. The Planetesimal Hypothesis, And Others
Chapter 2. The Local Solar System {A Synopsis)
Chapter 3. The Sun
Chapter 4. Mercury And Venus
Chapter 5. The Earth, The Tides, And Time
Chapter 6. The Moon
Chapter 7. The Eclipses
Chapter 8. Mars And The Planetoids
Chapter 9. Jupiter And Saturn
Chapter 10. Uranus And Neptune
Chapter 11. Comets And Meteors