The phrase "a spare read" is correct and usable in written English.
It can be used to refer to an additional or extra reading material that one can refer to or use for information or enjoyment.
Example: "I always keep a spare read in my bag for those moments when I have some free time."
Alternatives: "an extra read" or "a backup read".
If you do frame favorites, you might also consider having a spare reading copy available.
IF YOU have a moment to spare, read the February edition of the Bank of Japan Quarterly (an under-rated publication) and be amazed by the Japanese banks' sophistication in managing their trading risks.
The string players rearrange themselves into a maraca-wielding rhythm section for the tumbleweed dirge of Mescalito, and drop away entirely for a spare, tense reading of Mack the Knife, apparently modelled closely on a version by Dave Van Ronk, the inspiration for the Coen Brothers Inside Llewynn Davis.
Similarly somber, mind-boggling tales are made increasingly intense by being delivered in a matter-of-fact way in this dark, spare reading, directed by Bob Balaban.
As he showed me around the disorienting warren of grand halls, spare reading rooms, offices, and laboratories that constitute the Vatican Library today, everything did look as if it had just been, or was still being, painted or shined.
"Got a spare room?" it read.
This month, with all my focus given to recipes, collecting appropriate props, making lists and prepping my ingredients, I haven't managed to grab a spare moment to read anything new.
Mr. Ponthus gave, for example, a spare, thoroughly soulful reading of the slow movement, in which the spread of pitches is extreme and the dynamics are tightly constrained.
The descriptions of his early days in France, when Olney was finding his way socially and defining his domestic life (he almost always lived alone), read like a spare postwar novel.
"Leaving blanks keeps the phone number easy to read, but creates a spare, modern line".
