No the Flash running at full speed would I am a Baseball Dad It’s like a normal Dad but way cooler shirt bounce off the Juggernaut but would most likely become a smear on the Juggernauts body from the impact. Once the Juggernaut gets moving almost nothing can stop him. While its true the speed force grants the Flash a protective aura that protects both him and the surrounding environment from the effects of his speed (also allowing him to punch people with Superman level durability at almost or even faster than light speed). Running straight into the Juggernaut is just too much. However Flash may be able to phase through Juggernaut and if that works both come out fine.
I am a Baseball Dad It’s like a normal Dad but way cooler shirt, hoodie, sweater and v-neck t-shirt
Best I am a Baseball Dad It’s like a normal Dad but way cooler shirt
The Flash could even try something like this I am a Baseball Dad It’s like a normal Dad but way cooler shirt on Juggs but it’s unlikely to due anything as Juggs is too durable. Back in the day, Flash used to blow things up when vibrating through them but that wouldn’t hurt Juggs. There is also a chance he can’t phase through Juggernauts shield and he gets flattened anyways. Assuming that these are not stolen books, or books someone forgot to return, in which case they need to be taken back to the original library, then I would triage the herd in the following manner: Fiction would be taken to homeless shelters. The non-fiction of the do-it-yourself variety would be taken to homeless shelters. Non-fiction that still seems relevant would go to the local high school library. The remainders would be turned into book safes and sold on Etsy and eBay.