For the general subject of light the reader must be referred to a
rather technical work, but one of the best in the English language:
Edwin Edser, Light for Students (Macmillan, 1907).
The nature of matter and electricity is excellently discussed in
several books of a popular variety. The very best and most complete
of its kind that has come to the author's attention is Comstock and
Troland's The Nature of Matter and Electricity (D. Van Nostrand Co.,
1919). Two other very readable books are Soddy's Matter and Energy
(Henry Holt and Co.) and Crehore's The Mystery of Matter and Energy
(D. Van Nostrand Co., 1917).