a) From Stone to Steel (Monkey God/Highmoon)
b) Hot Pursuit and Hot Pursuit: On Foot (Adamant)
c) a book of alternative rules
- alternatives to per encounter/daily or at least some option tied to action points to reuse.
- using skill ranks instead of the current system
- splitting up skills
- adding craft and profession skills back in
- removing the +1/2 level bonus from ability checks and unskilled checks
- using 2e PO: Combat and Tactics style crit mechanics including a build a crit confirmation into the initial roll (I hate natural 20 as an automatic crit

)
- variant injury rules: long term injuries
- alternative healing rules
- economy: going back to the pre 4e economic system
- alternative rules for daily magic items.
- allowing monsters to get the full benefit of magic weapons and armor.
d) Environment Books
e) Genre Themed books
f) If doing class books
- focus on a single class as was done in the 2e Complete Handbooks and the 3e Mongoose Quintessential books, and Green Ronin's Master Class books.
- before creating a paragon path, ask if the concept is merely the background difference of training due to culture, occupation, or possibly a less generalized training. If so, create new starting builds and new/reflavored powers or, if its a strong cross-cultural or fantasy archetype (e.g, shaman), possibly a new class.