Students of Lore and Magic, Optional Spell-Casting Rules

From publisher blurb:

While spell-casters prove a powerful and invaluable ally in an adventuring party, there are many times that players choose other options and you end up missing a vital functionary within the party. Options generally run from providing NPC support or adjusting scenarios to deal with missing support. However, this issue of Player Paraphernalia presents another option, allowing traditionally non-spell casting class access to a limited number of either arcane or divine spells through the use of a series of new feats and optional rules regarding spell-casting for non-spell-casters.