Rick Brant Science Adventure book titled "The Ruby Ray Mystery" by John Blaine, published by Grosset & Dunlap, Inc. in 1964.
This hardcover volume is No. 19 in the series and features an illustrated cover depicting a dramatic mountain scene with a cabin and an explosion. The spine and back cover display the series branding and list additional titles. Interior pages and contents appear intact, with a table of contents listing 20 chapters.
Covers and binding show minor shelf wear with slight edge rubs, and the top page edges are tinted red. See photos for Measurements if Measurements were taken.