This July we're starting a new monthly item to help you with your Spidey purchases. Based on the Marvel Previews #59, July for September, I'd say you need to pre-order the following books in order to keep up with Spider-Man.
Core titles
Amazing Spider-Girl #24
Amazing Spider-Man #570
Amazing Spider-Man #570, monkey variant cover
Amazing Spider-Man #571
Amazing Spider-Man #572
Marvel Adventures Avengers #28
Marvel Adventures Spider-Man #43
Marvel Adventures Super Heroes #3
Spider-Man Loves Mary Jane #2
Spider-Man Loves Mary Jane #2, monkey variant cover
Ultimate Spider-Man #126
Appearances
Marvel 1985 #5
Marvel Apes #1
Marvel Apes #1, variant cover by Ramon Bachs
Marvel Apes #2
Marvel Apes #2, variant cover by Phil Jimenez
Ms. Marvel Annual #1
New Avengers #45
Ultimate Origins #4
X-Men: First Class #16
Reprints
Essential Official Handbook Of The Marvel Universe Master Edition Vol. 3 TPB
Hulk Chronicles: WWH #3, reprint WWH #2
Marvel Adventures Spider-Man Vol. 10: Identity Crisis Digest TPB, reprint MA
SPM #37-40
Marvel Adventures Two-In-One #15, reprint MA SPM #41
Marvel Two-In-One #15, reprint MA Avengers #15
Punisher By Garth Ennis Omnibus HC, reprint MK PUN #2,33-37
Spider-Man / Red Sonja TPB, reprint SPM/RS #1-5 & MTU #79
Spider-Man Family: Itsy-Bitsy Battles Digest TPB, reprint SPM Family #7-9
Spider-Man: Brand New Day Vol. 3 Premiere HC, reprint ASM #559-563
Ultimate Power TPB, reprint ULT POWER #1-9