BLB's actually first appeared in 1932, published by Whitman (the same company who provided them for our perusal in the 60's and 70's). In those days the books were filled with tales of Slam Bradley, Mickey Mouse, The Gumps, The Shadow, and many other stars of film, radio and the pulps.
In our era, of course, they added in many favorites from television: Flipper, Lassie, Daktari, Frankenstein Jr., and many many more. I had quite a few of these thick tomes, stacked alongside my beloved comics. Some of those I recall most fondly: Popeye ("Ghost Ship to Treasure Island"), Bugs Bunny ("Double Trouble on Diamond Island"), and Donald Duck ("The Fabulous Diamond Fountain") . I know, we see a pattern of sorts here- they all seemed to combine the lure of treasure and some element of menace; a pairing hard to resist for any kid.
One I recall especially well: Woody Woodpecker ("The Meteor Menace"). Indeed, this is one I've managed to reacquire in recent years, and got a kick out of reading it again. Here you see the opening page, showing the standard format of text on the right, illustrations on the left. No credits were given for the creators, unfortunately (The Fantastic Four BLB has art that greatly resembles Kirby, but I don't think it actually was). The story itself is full of gimmicks, tricks, gadgets, and mysteries (Woody's nephew Knothead even has a secret spy kit that proves integral to the plot). At 250 pages, it makes for a pretty long tale, albeit a quick one to read (after all, you only get about a paragraph on a page).
Those old BLB's from the 30's to the 50's were all in 'hardback' form (actually a sort of cardboard cover). The late 60's versions also had a stiff cover, although the spines didn't hold up very well. The later books from the 70's were soft paper covers, and basically reprinted many of the previous decade's offerings. Hard or soft cover, the Big Little Books offered a lot of reading enjoyment for the price of a couple of comics. And they were easier to fit in a backpack or suitcase or camp bag, and less likely than a comic to end up crinkled to unreadability. Now here's a few to jog your memories. Which ones did you have?
