Purple reign

Here's a "SWORN EPIC." (Those are the only nine letters to appear in both the plaintext and the ciphertext.)

RCRP ENCRIPO SWW ENCRIPOO: ENCRIPOO SCRIPO. WRP EWE CIWR SWWO ENCRIPOO: ENCRIPOO OSWWRO. (ENCRIP SCRO RCIP INWSR CR ENWIPOO.)

Forty-three famous Americans

Okay, this one's probably too tough for the grownups. Got any kids or grandkids around? Let's sit back and see if they can figure out what this is.

What's the meaning of these letters?

GW JA TJ JM JM JA AJ MV WH JT
JP ZT MF FP JB AL AJ UG RH JG
CA GC BH GC WM TR WT WW WH CC
HH FR HT DE JK LJ RN GF JC RR
GB BC GB BO

Hint: See picture. Your initial hunch might be right.
Technical stuff: This is kind of a code, not a cipher.

Atbash cipher

GSV DLIW “ZGYZHS,” RMXRWVMGZOOB, WVIREVH UILN GSV EVIB KILXVWFIV RG WVMLGVH, HRMXV RG RH XLNKLHVW LU ZOVKS, GZD, YVGS, ZMW HSRM — GSV URIHG, OZHG, HVXLMW, ZMW MVCG–GL–OZHG OVGGVIH LU GSV SVYIVD ZOKSZYVG.