diff --git a/book/src/SUMMARY.md b/book/src/SUMMARY.md
index 40545a9578..a2be323e5d 100644
--- a/book/src/SUMMARY.md
+++ b/book/src/SUMMARY.md
@@ -35,11 +35,13 @@
       - [Incomplete and complete addition](design/gadgets/ecc/addition.md)
       - [Fixed-base scalar multiplication](design/gadgets/ecc/fixed-base-scalar-mul.md)
       - [Variable-base scalar multiplication](design/gadgets/ecc/var-base-scalar-mul.md)
+      - [Variable-base sign-scalar multiplication](design/gadgets/ecc/var-base-sign-scalar-mul.md)
     - [Sinsemilla](design/gadgets/sinsemilla.md)
       - [MerkleCRH](design/gadgets/sinsemilla/merkle-crh.md)
     - [Decomposition](design/gadgets/decomposition.md)
     - [SHA-256](design/gadgets/sha256.md)
       - [16-bit table chip](design/gadgets/sha256/table16.md)
+    - [Multiplexer](design/gadgets/multiplexer.md)
 - [Background Material](background.md)
   - [Fields](background/fields.md)
   - [Polynomials](background/polynomials.md)