Are the discretionary actions of the federal Bureau of Prisons exempt from judicial scrutiny when sued for regulatory noncompliance under the Administrative Procedure Act and Accardi doctrine?

Question Presented _ -Ate‘discrétionary actions of the federal Bureau of Prisons ("FBOP")— , an executive agency responsible for more than 130-thousand prisoners nationwide—exempt from judicial scrutiny of these actions when sued for regulatory noncompliance under the Administrative Procedure Act and Accardi doc. trine for the violation of regulations that affect the interests in law library access, typewriter access, and U.S. mail access, . but do not, necessarily, violate her constitutional rights? Or, are these actions reviewable and its regulations (C.F.R.s), duly promulgated under. ~ the authority of 18 U.S.C. §§ 4041 and 4042, enforceable? ; i